Feat/email register refactor (#25369)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: crazywoola <100913391+crazywoola@users.noreply.github.com>
Co-authored-by: Joel <iamjoel007@gmail.com>

api/.env.example

 
 # Reset password token expiry minutes
 RESET_PASSWORD_TOKEN_EXPIRY_MINUTES=5
+EMAIL_REGISTER_TOKEN_EXPIRY_MINUTES=5
 CHANGE_EMAIL_TOKEN_EXPIRY_MINUTES=5
 OWNER_TRANSFER_TOKEN_EXPIRY_MINUTES=5
 

api/configs/feature/__init__.py

         description="Duration in minutes for which a password reset token remains valid",
         default=5,
     )
+
+    EMAIL_REGISTER_TOKEN_EXPIRY_MINUTES: PositiveInt = Field(
+        description="Duration in minutes for which a email register token remains valid",
+        default=5,
+    )
+
     CHANGE_EMAIL_TOKEN_EXPIRY_MINUTES: PositiveInt = Field(
         description="Duration in minutes for which a change email token remains valid",
         default=5,
         default=86400,
     )
 
+    EMAIL_REGISTER_LOCKOUT_DURATION: PositiveInt = Field(
+        description="Time (in seconds) a user must wait before retrying email register after exceeding the rate limit.",
+        default=86400,
+    )
+
 
 class ModerationConfig(BaseSettings):
     """

api/controllers/console/__init__.py

     activate,  # pyright: ignore[reportUnusedImport]
     data_source_bearer_auth,  # pyright: ignore[reportUnusedImport]
     data_source_oauth,  # pyright: ignore[reportUnusedImport]
+    email_register,  # pyright: ignore[reportUnusedImport]
     forgot_password,  # pyright: ignore[reportUnusedImport]
     login,  # pyright: ignore[reportUnusedImport]
     oauth,  # pyright: ignore[reportUnusedImport]

api/controllers/console/auth/email_register.py

+from flask import request
+from flask_restx import Resource, reqparse
+from sqlalchemy import select
+from sqlalchemy.orm import Session
+
+from configs import dify_config
+from constants.languages import languages
+from controllers.console import api
+from controllers.console.auth.error import (
+    EmailAlreadyInUseError,
+    EmailCodeError,
+    EmailRegisterLimitError,
+    InvalidEmailError,
+    InvalidTokenError,
+    PasswordMismatchError,
+)
+from controllers.console.error import AccountInFreezeError, EmailSendIpLimitError
+from controllers.console.wraps import email_password_login_enabled, email_register_enabled, setup_required
+from extensions.ext_database import db
+from libs.helper import email, extract_remote_ip
+from libs.password import valid_password
+from models.account import Account
+from services.account_service import AccountService
+from services.billing_service import BillingService
+from services.errors.account import AccountNotFoundError, AccountRegisterError
+
+
+class EmailRegisterSendEmailApi(Resource):
+    @setup_required
+    @email_password_login_enabled
+    @email_register_enabled
+    def post(self):
+        parser = reqparse.RequestParser()
+        parser.add_argument("email", type=email, required=True, location="json")
+        parser.add_argument("language", type=str, required=False, location="json")
+        args = parser.parse_args()
+
+        ip_address = extract_remote_ip(request)
+        if AccountService.is_email_send_ip_limit(ip_address):
+            raise EmailSendIpLimitError()
+        language = "en-US"
+        if args["language"] in languages:
+            language = args["language"]
+
+        if dify_config.BILLING_ENABLED and BillingService.is_email_in_freeze(args["email"]):
+            raise AccountInFreezeError()
+
+        with Session(db.engine) as session:
+            account = session.execute(select(Account).filter_by(email=args["email"])).scalar_one_or_none()
+        token = None
+        token = AccountService.send_email_register_email(email=args["email"], account=account, language=language)
+        return {"result": "success", "data": token}
+
+
+class EmailRegisterCheckApi(Resource):
+    @setup_required
+    @email_password_login_enabled
+    @email_register_enabled
+    def post(self):
+        parser = reqparse.RequestParser()
+        parser.add_argument("email", type=str, required=True, location="json")
+        parser.add_argument("code", type=str, required=True, location="json")
+        parser.add_argument("token", type=str, required=True, nullable=False, location="json")
+        args = parser.parse_args()
+
+        user_email = args["email"]
+
+        is_email_register_error_rate_limit = AccountService.is_email_register_error_rate_limit(args["email"])
+        if is_email_register_error_rate_limit:
+            raise EmailRegisterLimitError()
+
+        token_data = AccountService.get_email_register_data(args["token"])
+        if token_data is None:
+            raise InvalidTokenError()
+
+        if user_email != token_data.get("email"):
+            raise InvalidEmailError()
+
+        if args["code"] != token_data.get("code"):
+            AccountService.add_email_register_error_rate_limit(args["email"])
+            raise EmailCodeError()
+
+        # Verified, revoke the first token
+        AccountService.revoke_email_register_token(args["token"])
+
+        # Refresh token data by generating a new token
+        _, new_token = AccountService.generate_email_register_token(
+            user_email, code=args["code"], additional_data={"phase": "register"}
+        )
+
+        AccountService.reset_email_register_error_rate_limit(args["email"])
+        return {"is_valid": True, "email": token_data.get("email"), "token": new_token}
+
+
+class EmailRegisterResetApi(Resource):
+    @setup_required
+    @email_password_login_enabled
+    @email_register_enabled
+    def post(self):
+        parser = reqparse.RequestParser()
+        parser.add_argument("token", type=str, required=True, nullable=False, location="json")
+        parser.add_argument("new_password", type=valid_password, required=True, nullable=False, location="json")
+        parser.add_argument("password_confirm", type=valid_password, required=True, nullable=False, location="json")
+        args = parser.parse_args()
+
+        # Validate passwords match
+        if args["new_password"] != args["password_confirm"]:
+            raise PasswordMismatchError()
+
+        # Validate token and get register data
+        register_data = AccountService.get_email_register_data(args["token"])
+        if not register_data:
+            raise InvalidTokenError()
+        # Must use token in reset phase
+        if register_data.get("phase", "") != "register":
+            raise InvalidTokenError()
+
+        # Revoke token to prevent reuse
+        AccountService.revoke_email_register_token(args["token"])
+
+        email = register_data.get("email", "")
+
+        with Session(db.engine) as session:
+            account = session.execute(select(Account).filter_by(email=email)).scalar_one_or_none()
+
+            if account:
+                raise EmailAlreadyInUseError()
+            else:
+                account = self._create_new_account(email, args["password_confirm"])
+                if not account:
+                    raise AccountNotFoundError()
+                token_pair = AccountService.login(account=account, ip_address=extract_remote_ip(request))
+                AccountService.reset_login_error_rate_limit(email)
+
+        return {"result": "success", "data": token_pair.model_dump()}
+
+    def _create_new_account(self, email, password) -> Account | None:
+        # Create new account if allowed
+        account = None
+        try:
+            account = AccountService.create_account_and_tenant(
+                email=email,
+                name=email,
+                password=password,
+                interface_language=languages[0],
+            )
+        except AccountRegisterError:
+            raise AccountInFreezeError()
+
+        return account
+
+
+api.add_resource(EmailRegisterSendEmailApi, "/email-register/send-email")
+api.add_resource(EmailRegisterCheckApi, "/email-register/validity")
+api.add_resource(EmailRegisterResetApi, "/email-register")

api/controllers/console/auth/error.py

 
 class PasswordResetRateLimitExceededError(BaseHTTPException):
     error_code = "password_reset_rate_limit_exceeded"
-    description = "Too many password reset emails have been sent. Please try again in 1 minute."
+    description = "Too many password reset emails have been sent. Please try again in {minutes} minutes."
     code = 429
 
+    def __init__(self, minutes: int = 1):
+        description = self.description.format(minutes=int(minutes)) if self.description else None
+        super().__init__(description=description)
+
+
+class EmailRegisterRateLimitExceededError(BaseHTTPException):
+    error_code = "email_register_rate_limit_exceeded"
+    description = "Too many email register emails have been sent. Please try again in {minutes} minutes."
+    code = 429
+
+    def __init__(self, minutes: int = 1):
+        description = self.description.format(minutes=int(minutes)) if self.description else None
+        super().__init__(description=description)
+
 
 class EmailChangeRateLimitExceededError(BaseHTTPException):
     error_code = "email_change_rate_limit_exceeded"
-    description = "Too many email change emails have been sent. Please try again in 1 minute."
+    description = "Too many email change emails have been sent. Please try again in {minutes} minutes."
     code = 429
 
+    def __init__(self, minutes: int = 1):
+        description = self.description.format(minutes=int(minutes)) if self.description else None
+        super().__init__(description=description)
+
 
 class OwnerTransferRateLimitExceededError(BaseHTTPException):
     error_code = "owner_transfer_rate_limit_exceeded"
-    description = "Too many owner transfer emails have been sent. Please try again in 1 minute."
+    description = "Too many owner transfer emails have been sent. Please try again in {minutes} minutes."
     code = 429
 
+    def __init__(self, minutes: int = 1):
+        description = self.description.format(minutes=int(minutes)) if self.description else None
+        super().__init__(description=description)
+
 
 class EmailCodeError(BaseHTTPException):
     error_code = "email_code_error"
 
 class EmailCodeLoginRateLimitExceededError(BaseHTTPException):
     error_code = "email_code_login_rate_limit_exceeded"
-    description = "Too many login emails have been sent. Please try again in 5 minutes."
+    description = "Too many login emails have been sent. Please try again in {minutes} minutes."
     code = 429
 
+    def __init__(self, minutes: int = 5):
+        description = self.description.format(minutes=int(minutes)) if self.description else None
+        super().__init__(description=description)
+
 
 class EmailCodeAccountDeletionRateLimitExceededError(BaseHTTPException):
     error_code = "email_code_account_deletion_rate_limit_exceeded"
-    description = "Too many account deletion emails have been sent. Please try again in 5 minutes."
+    description = "Too many account deletion emails have been sent. Please try again in {minutes} minutes."
     code = 429
 
+    def __init__(self, minutes: int = 5):
+        description = self.description.format(minutes=int(minutes)) if self.description else None
+        super().__init__(description=description)
+
 
 class EmailPasswordResetLimitError(BaseHTTPException):
     error_code = "email_password_reset_limit"
     code = 429
 
 
+class EmailRegisterLimitError(BaseHTTPException):
+    error_code = "email_register_limit"
+    description = "Too many failed email register attempts. Please try again in 24 hours."
+    code = 429
+
+
 class EmailChangeLimitError(BaseHTTPException):
     error_code = "email_change_limit"
     description = "Too many failed email change attempts. Please try again in 24 hours."

api/controllers/console/auth/forgot_password.py

 from sqlalchemy import select
 from sqlalchemy.orm import Session
 
-from constants.languages import languages
 from controllers.console import api, console_ns
 from controllers.console.auth.error import (
     EmailCodeError,
     InvalidTokenError,
     PasswordMismatchError,
 )
-from controllers.console.error import AccountInFreezeError, AccountNotFound, EmailSendIpLimitError
+from controllers.console.error import AccountNotFound, EmailSendIpLimitError
 from controllers.console.wraps import email_password_login_enabled, setup_required
 from events.tenant_event import tenant_was_created
 from extensions.ext_database import db
 from libs.password import hash_password, valid_password
 from models.account import Account
 from services.account_service import AccountService, TenantService
-from services.errors.account import AccountRegisterError
-from services.errors.workspace import WorkSpaceNotAllowedCreateError, WorkspacesLimitExceededError
 from services.feature_service import FeatureService
 
 
 
         with Session(db.engine) as session:
             account = session.execute(select(Account).filter_by(email=args["email"])).scalar_one_or_none()
-        token = None
-        if account is None:
-            if FeatureService.get_system_features().is_allow_register:
-                token = AccountService.send_reset_password_email(email=args["email"], language=language)
-                return {"result": "fail", "data": token, "code": "account_not_found"}
-            else:
-                raise AccountNotFound()
-        else:
-            token = AccountService.send_reset_password_email(account=account, email=args["email"], language=language)
+
+        token = AccountService.send_reset_password_email(
+            account=account,
+            email=args["email"],
+            language=language,
+            is_allow_register=FeatureService.get_system_features().is_allow_register,
+        )
 
         return {"result": "success", "data": token}
 
             if account:
                 self._update_existing_account(account, password_hashed, salt, session)
             else:
-                self._create_new_account(email, args["password_confirm"])
+                raise AccountNotFound()
 
         return {"result": "success"}
 
             account.current_tenant = tenant
             tenant_was_created.send(tenant)
 
-    def _create_new_account(self, email, password):
-        # Create new account if allowed
-        try:
-            AccountService.create_account_and_tenant(
-                email=email,
-                name=email,
-                password=password,
-                interface_language=languages[0],
-            )
-        except WorkSpaceNotAllowedCreateError:
-            pass
-        except WorkspacesLimitExceededError:
-            pass
-        except AccountRegisterError:
-            raise AccountInFreezeError()
+
+api.add_resource(ForgotPasswordSendEmailApi, "/forgot-password")
+api.add_resource(ForgotPasswordCheckApi, "/forgot-password/validity")
+api.add_resource(ForgotPasswordResetApi, "/forgot-password/resets")

api/controllers/console/auth/login.py

 from controllers.console.wraps import email_password_login_enabled, setup_required
 from events.tenant_event import tenant_was_created
 from libs.helper import email, extract_remote_ip
-from libs.password import valid_password
 from models.account import Account
 from services.account_service import AccountService, RegisterService, TenantService
 from services.billing_service import BillingService
         """Authenticate user and login."""
         parser = reqparse.RequestParser()
         parser.add_argument("email", type=email, required=True, location="json")
-        parser.add_argument("password", type=valid_password, required=True, location="json")
+        parser.add_argument("password", type=str, required=True, location="json")
         parser.add_argument("remember_me", type=bool, required=False, default=False, location="json")
         parser.add_argument("invite_token", type=str, required=False, default=None, location="json")
-        parser.add_argument("language", type=str, required=False, default="en-US", location="json")
         args = parser.parse_args()
 
         if dify_config.BILLING_ENABLED and BillingService.is_email_in_freeze(args["email"]):
         if invitation:
             invitation = RegisterService.get_invitation_if_token_valid(None, args["email"], invitation)
 
-        if args["language"] is not None and args["language"] == "zh-Hans":
-            language = "zh-Hans"
-        else:
-            language = "en-US"
-
         try:
             if invitation:
                 data = invitation.get("data", {})
         except services.errors.account.AccountPasswordError:
             AccountService.add_login_error_rate_limit(args["email"])
             raise AuthenticationFailedError()
-        except services.errors.account.AccountNotFoundError:
-            if FeatureService.get_system_features().is_allow_register:
-                token = AccountService.send_reset_password_email(email=args["email"], language=language)
-                return {"result": "fail", "data": token, "code": "account_not_found"}
-            else:
-                raise AccountNotFound()
         # SELF_HOSTED only have one workspace
         tenants = TenantService.get_join_tenants(account)
         if len(tenants) == 0:
         except AccountRegisterError:
             raise AccountInFreezeError()
 
-        if account is None:
-            if FeatureService.get_system_features().is_allow_register:
-                token = AccountService.send_reset_password_email(email=args["email"], language=language)
-            else:
-                raise AccountNotFound()
-        else:
-            token = AccountService.send_reset_password_email(account=account, language=language)
+        token = AccountService.send_reset_password_email(
+            email=args["email"],
+            account=account,
+            language=language,
+            is_allow_register=FeatureService.get_system_features().is_allow_register,
+        )
 
         return {"result": "success", "data": token}
 

api/controllers/console/auth/oauth.py

 from models import Account
 from models.account import AccountStatus
 from services.account_service import AccountService, RegisterService, TenantService
+from services.billing_service import BillingService
 from services.errors.account import AccountNotFoundError, AccountRegisterError
 from services.errors.workspace import WorkSpaceNotAllowedCreateError, WorkSpaceNotFoundError
 from services.feature_service import FeatureService
 
     if not account:
         if not FeatureService.get_system_features().is_allow_register:
-            raise AccountNotFoundError()
+            if dify_config.BILLING_ENABLED and BillingService.is_email_in_freeze(user_info.email):
+                raise AccountRegisterError(
+                    description=(
+                        "This email account has been deleted within the past "
+                        "30 days and is temporarily unavailable for new account registration"
+                    )
+                )
+            else:
+                raise AccountRegisterError(description=("Invalid email or password"))
         account_name = user_info.name or "Dify"
         account = RegisterService.register(
             email=user_info.email, name=account_name, password=None, open_id=user_info.id, provider=provider

api/controllers/console/wraps.py

     return decorated
 
 
+def email_register_enabled(view):
+    @wraps(view)
+    def decorated(*args, **kwargs):
+        features = FeatureService.get_system_features()
+        if features.is_allow_register:
+            return view(*args, **kwargs)
+
+        # otherwise, return 403
+        abort(403)
+
+    return decorated
+
+
 def enable_change_email(view: Callable[P, R]):
     @wraps(view)
     def decorated(*args: P.args, **kwargs: P.kwargs):

api/libs/email_i18n.py

     """Enumeration of supported email types."""
 
     RESET_PASSWORD = "reset_password"
+    RESET_PASSWORD_WHEN_ACCOUNT_NOT_EXIST = "reset_password_when_account_not_exist"
     INVITE_MEMBER = "invite_member"
     EMAIL_CODE_LOGIN = "email_code_login"
     CHANGE_EMAIL_OLD = "change_email_old"
     ENTERPRISE_CUSTOM = "enterprise_custom"
     QUEUE_MONITOR_ALERT = "queue_monitor_alert"
     DOCUMENT_CLEAN_NOTIFY = "document_clean_notify"
+    EMAIL_REGISTER = "email_register"
+    EMAIL_REGISTER_WHEN_ACCOUNT_EXIST = "email_register_when_account_exist"
+    RESET_PASSWORD_WHEN_ACCOUNT_NOT_EXIST_NO_REGISTER = "reset_password_when_account_not_exist_no_register"
 
 
 class EmailLanguage(Enum):
                 branded_template_path="clean_document_job_mail_template_zh-CN.html",
             ),
         },
+        EmailType.EMAIL_REGISTER: {
+            EmailLanguage.EN_US: EmailTemplate(
+                subject="Register Your {application_title} Account",
+                template_path="register_email_template_en-US.html",
+                branded_template_path="without-brand/register_email_template_en-US.html",
+            ),
+            EmailLanguage.ZH_HANS: EmailTemplate(
+                subject="注册您的 {application_title} 账户",
+                template_path="register_email_template_zh-CN.html",
+                branded_template_path="without-brand/register_email_template_zh-CN.html",
+            ),
+        },
+        EmailType.EMAIL_REGISTER_WHEN_ACCOUNT_EXIST: {
+            EmailLanguage.EN_US: EmailTemplate(
+                subject="Register Your {application_title} Account",
+                template_path="register_email_when_account_exist_template_en-US.html",
+                branded_template_path="without-brand/register_email_when_account_exist_template_en-US.html",
+            ),
+            EmailLanguage.ZH_HANS: EmailTemplate(
+                subject="注册您的 {application_title} 账户",
+                template_path="register_email_when_account_exist_template_zh-CN.html",
+                branded_template_path="without-brand/register_email_when_account_exist_template_zh-CN.html",
+            ),
+        },
+        EmailType.RESET_PASSWORD_WHEN_ACCOUNT_NOT_EXIST: {
+            EmailLanguage.EN_US: EmailTemplate(
+                subject="Reset Your {application_title} Password",
+                template_path="reset_password_mail_when_account_not_exist_template_en-US.html",
+                branded_template_path="without-brand/reset_password_mail_when_account_not_exist_template_en-US.html",
+            ),
+            EmailLanguage.ZH_HANS: EmailTemplate(
+                subject="重置您的 {application_title} 密码",
+                template_path="reset_password_mail_when_account_not_exist_template_zh-CN.html",
+                branded_template_path="without-brand/reset_password_mail_when_account_not_exist_template_zh-CN.html",
+            ),
+        },
+        EmailType.RESET_PASSWORD_WHEN_ACCOUNT_NOT_EXIST_NO_REGISTER: {
+            EmailLanguage.EN_US: EmailTemplate(
+                subject="Reset Your {application_title} Password",
+                template_path="reset_password_mail_when_account_not_exist_no_register_template_en-US.html",
+                branded_template_path="without-brand/reset_password_mail_when_account_not_exist_no_register_template_en-US.html",
+            ),
+            EmailLanguage.ZH_HANS: EmailTemplate(
+                subject="重置您的 {application_title} 密码",
+                template_path="reset_password_mail_when_account_not_exist_no_register_template_zh-CN.html",
+                branded_template_path="without-brand/reset_password_mail_when_account_not_exist_no_register_template_zh-CN.html",
+            ),
+        },
     }
 
     return EmailI18nConfig(templates=templates)

api/services/account_service.py

 from services.errors.account import (
     AccountAlreadyInTenantError,
     AccountLoginError,
-    AccountNotFoundError,
     AccountNotLinkTenantError,
     AccountPasswordError,
     AccountRegisterError,
     send_old_owner_transfer_notify_email_task,
     send_owner_transfer_confirm_task,
 )
-from tasks.mail_reset_password_task import send_reset_password_mail_task
+from tasks.mail_register_task import send_email_register_mail_task, send_email_register_mail_task_when_account_exist
+from tasks.mail_reset_password_task import (
+    send_reset_password_mail_task,
+    send_reset_password_mail_task_when_account_not_exist,
+)
 
 logger = logging.getLogger(__name__)
 
 
 class AccountService:
     reset_password_rate_limiter = RateLimiter(prefix="reset_password_rate_limit", max_attempts=1, time_window=60 * 1)
+    email_register_rate_limiter = RateLimiter(prefix="email_register_rate_limit", max_attempts=1, time_window=60 * 1)
     email_code_login_rate_limiter = RateLimiter(
-        prefix="email_code_login_rate_limit", max_attempts=1, time_window=60 * 1
+        prefix="email_code_login_rate_limit", max_attempts=3, time_window=300 * 1
     )
     email_code_account_deletion_rate_limiter = RateLimiter(
         prefix="email_code_account_deletion_rate_limit", max_attempts=1, time_window=60 * 1
     FORGOT_PASSWORD_MAX_ERROR_LIMITS = 5
     CHANGE_EMAIL_MAX_ERROR_LIMITS = 5
     OWNER_TRANSFER_MAX_ERROR_LIMITS = 5
+    EMAIL_REGISTER_MAX_ERROR_LIMITS = 5
 
     @staticmethod
     def _get_refresh_token_key(refresh_token: str) -> str:
 
         account = db.session.query(Account).filter_by(email=email).first()
         if not account:
-            raise AccountNotFoundError()
+            raise AccountPasswordError("Invalid email or password.")
 
         if account.status == AccountStatus.BANNED.value:
             raise AccountLoginError("Account is banned.")
         if cls.email_code_account_deletion_rate_limiter.is_rate_limited(email):
             from controllers.console.auth.error import EmailCodeAccountDeletionRateLimitExceededError
 
-            raise EmailCodeAccountDeletionRateLimitExceededError()
+            raise EmailCodeAccountDeletionRateLimitExceededError(
+                int(cls.email_code_account_deletion_rate_limiter.time_window / 60)
+            )
 
         send_account_deletion_verification_code.delay(to=email, code=code)
 
         account: Optional[Account] = None,
         email: Optional[str] = None,
         language: str = "en-US",
+        is_allow_register: bool = False,
     ):
         account_email = account.email if account else email
         if account_email is None:
         if cls.reset_password_rate_limiter.is_rate_limited(account_email):
             from controllers.console.auth.error import PasswordResetRateLimitExceededError
 
-            raise PasswordResetRateLimitExceededError()
+            raise PasswordResetRateLimitExceededError(int(cls.reset_password_rate_limiter.time_window / 60))
 
         code, token = cls.generate_reset_password_token(account_email, account)
 
-        send_reset_password_mail_task.delay(
-            language=language,
-            to=account_email,
-            code=code,
-        )
+        if account:
+            send_reset_password_mail_task.delay(
+                language=language,
+                to=account_email,
+                code=code,
+            )
+        else:
+            send_reset_password_mail_task_when_account_not_exist.delay(
+                language=language,
+                to=account_email,
+                is_allow_register=is_allow_register,
+            )
         cls.reset_password_rate_limiter.increment_rate_limit(account_email)
         return token
 
+    @classmethod
+    def send_email_register_email(
+        cls,
+        account: Optional[Account] = None,
+        email: Optional[str] = None,
+        language: str = "en-US",
+    ):
+        account_email = account.email if account else email
+        if account_email is None:
+            raise ValueError("Email must be provided.")
+
+        if cls.email_register_rate_limiter.is_rate_limited(account_email):
+            from controllers.console.auth.error import EmailRegisterRateLimitExceededError
+
+            raise EmailRegisterRateLimitExceededError(int(cls.email_register_rate_limiter.time_window / 60))
+
+        code, token = cls.generate_email_register_token(account_email)
+
+        if account:
+            send_email_register_mail_task_when_account_exist.delay(
+                language=language,
+                to=account_email,
+                account_name=account.name,
+            )
+
+        else:
+            send_email_register_mail_task.delay(
+                language=language,
+                to=account_email,
+                code=code,
+            )
+        cls.email_register_rate_limiter.increment_rate_limit(account_email)
+        return token
+
     @classmethod
     def send_change_email_email(
         cls,
         if cls.change_email_rate_limiter.is_rate_limited(account_email):
             from controllers.console.auth.error import EmailChangeRateLimitExceededError
 
-            raise EmailChangeRateLimitExceededError()
+            raise EmailChangeRateLimitExceededError(int(cls.change_email_rate_limiter.time_window / 60))
 
         code, token = cls.generate_change_email_token(account_email, account, old_email=old_email)
 
         if cls.owner_transfer_rate_limiter.is_rate_limited(account_email):
             from controllers.console.auth.error import OwnerTransferRateLimitExceededError
 
-            raise OwnerTransferRateLimitExceededError()
+            raise OwnerTransferRateLimitExceededError(int(cls.owner_transfer_rate_limiter.time_window / 60))
 
         code, token = cls.generate_owner_transfer_token(account_email, account)
         workspace_name = workspace_name or ""
         )
         return code, token
 
+    @classmethod
+    def generate_email_register_token(
+        cls,
+        email: str,
+        code: Optional[str] = None,
+        additional_data: dict[str, Any] = {},
+    ):
+        if not code:
+            code = "".join([str(secrets.randbelow(exclusive_upper_bound=10)) for _ in range(6)])
+        additional_data["code"] = code
+        token = TokenManager.generate_token(email=email, token_type="email_register", additional_data=additional_data)
+        return code, token
+
     @classmethod
     def generate_change_email_token(
         cls,
     def revoke_reset_password_token(cls, token: str):
         TokenManager.revoke_token(token, "reset_password")
 
+    @classmethod
+    def revoke_email_register_token(cls, token: str):
+        TokenManager.revoke_token(token, "email_register")
+
     @classmethod
     def revoke_change_email_token(cls, token: str):
         TokenManager.revoke_token(token, "change_email")
     def get_reset_password_data(cls, token: str) -> Optional[dict[str, Any]]:
         return TokenManager.get_token_data(token, "reset_password")
 
+    @classmethod
+    def get_email_register_data(cls, token: str) -> Optional[dict[str, Any]]:
+        return TokenManager.get_token_data(token, "email_register")
+
     @classmethod
     def get_change_email_data(cls, token: str) -> Optional[dict[str, Any]]:
         return TokenManager.get_token_data(token, "change_email")
         if cls.email_code_login_rate_limiter.is_rate_limited(email):
             from controllers.console.auth.error import EmailCodeLoginRateLimitExceededError
 
-            raise EmailCodeLoginRateLimitExceededError()
+            raise EmailCodeLoginRateLimitExceededError(int(cls.email_code_login_rate_limiter.time_window / 60))
 
         code = "".join([str(secrets.randbelow(exclusive_upper_bound=10)) for _ in range(6)])
         token = TokenManager.generate_token(
         count = int(count) + 1
         redis_client.setex(key, dify_config.FORGOT_PASSWORD_LOCKOUT_DURATION, count)
 
+    @staticmethod
+    @redis_fallback(default_return=None)
+    def add_email_register_error_rate_limit(email: str) -> None:
+        key = f"email_register_error_rate_limit:{email}"
+        count = redis_client.get(key)
+        if count is None:
+            count = 0
+        count = int(count) + 1
+        redis_client.setex(key, dify_config.EMAIL_REGISTER_LOCKOUT_DURATION, count)
+
     @staticmethod
     @redis_fallback(default_return=False)
     def is_forgot_password_error_rate_limit(email: str) -> bool:
         key = f"forgot_password_error_rate_limit:{email}"
         redis_client.delete(key)
 
+    @staticmethod
+    @redis_fallback(default_return=False)
+    def is_email_register_error_rate_limit(email: str) -> bool:
+        key = f"email_register_error_rate_limit:{email}"
+        count = redis_client.get(key)
+        if count is None:
+            return False
+        count = int(count)
+        if count > AccountService.EMAIL_REGISTER_MAX_ERROR_LIMITS:
+            return True
+        return False
+
+    @staticmethod
+    @redis_fallback(default_return=None)
+    def reset_email_register_error_rate_limit(email: str):
+        key = f"email_register_error_rate_limit:{email}"
+        redis_client.delete(key)
+
     @staticmethod
     @redis_fallback(default_return=None)
     def add_change_email_error_rate_limit(email: str):

api/tasks/mail_register_task.py

+import logging
+import time
+
+import click
+from celery import shared_task
+
+from configs import dify_config
+from extensions.ext_mail import mail
+from libs.email_i18n import EmailType, get_email_i18n_service
+
+logger = logging.getLogger(__name__)
+
+
+@shared_task(queue="mail")
+def send_email_register_mail_task(language: str, to: str, code: str) -> None:
+    """
+    Send email register email with internationalization support.
+
+    Args:
+        language: Language code for email localization
+        to: Recipient email address
+        code: Email register code
+    """
+    if not mail.is_inited():
+        return
+
+    logger.info(click.style(f"Start email register mail to {to}", fg="green"))
+    start_at = time.perf_counter()
+
+    try:
+        email_service = get_email_i18n_service()
+        email_service.send_email(
+            email_type=EmailType.EMAIL_REGISTER,
+            language_code=language,
+            to=to,
+            template_context={
+                "to": to,
+                "code": code,
+            },
+        )
+
+        end_at = time.perf_counter()
+        logger.info(
+            click.style(f"Send email register mail to {to} succeeded: latency: {end_at - start_at}", fg="green")
+        )
+    except Exception:
+        logger.exception("Send email register mail to %s failed", to)
+
+
+@shared_task(queue="mail")
+def send_email_register_mail_task_when_account_exist(language: str, to: str, account_name: str) -> None:
+    """
+    Send email register email with internationalization support when account exist.
+
+    Args:
+        language: Language code for email localization
+        to: Recipient email address
+    """
+    if not mail.is_inited():
+        return
+
+    logger.info(click.style(f"Start email register mail to {to}", fg="green"))
+    start_at = time.perf_counter()
+
+    try:
+        login_url = f"{dify_config.CONSOLE_WEB_URL}/signin"
+        reset_password_url = f"{dify_config.CONSOLE_WEB_URL}/reset-password"
+
+        email_service = get_email_i18n_service()
+        email_service.send_email(
+            email_type=EmailType.EMAIL_REGISTER_WHEN_ACCOUNT_EXIST,
+            language_code=language,
+            to=to,
+            template_context={
+                "to": to,
+                "login_url": login_url,
+                "reset_password_url": reset_password_url,
+                "account_name": account_name,
+            },
+        )
+
+        end_at = time.perf_counter()
+        logger.info(
+            click.style(f"Send email register mail to {to} succeeded: latency: {end_at - start_at}", fg="green")
+        )
+    except Exception:
+        logger.exception("Send email register mail to %s failed", to)

api/tasks/mail_reset_password_task.py

 import click
 from celery import shared_task
 
+from configs import dify_config
 from extensions.ext_mail import mail
 from libs.email_i18n import EmailType, get_email_i18n_service
 
         )
     except Exception:
         logger.exception("Send password reset mail to %s failed", to)
+
+
+@shared_task(queue="mail")
+def send_reset_password_mail_task_when_account_not_exist(language: str, to: str, is_allow_register: bool) -> None:
+    """
+    Send reset password email with internationalization support when account not exist.
+
+    Args:
+        language: Language code for email localization
+        to: Recipient email address
+    """
+    if not mail.is_inited():
+        return
+
+    logger.info(click.style(f"Start password reset mail to {to}", fg="green"))
+    start_at = time.perf_counter()
+
+    try:
+        if is_allow_register:
+            sign_up_url = f"{dify_config.CONSOLE_WEB_URL}/signup"
+            email_service = get_email_i18n_service()
+            email_service.send_email(
+                email_type=EmailType.RESET_PASSWORD_WHEN_ACCOUNT_NOT_EXIST,
+                language_code=language,
+                to=to,
+                template_context={
+                    "to": to,
+                    "sign_up_url": sign_up_url,
+                },
+            )
+        else:
+            email_service = get_email_i18n_service()
+            email_service.send_email(
+                email_type=EmailType.RESET_PASSWORD_WHEN_ACCOUNT_NOT_EXIST_NO_REGISTER,
+                language_code=language,
+                to=to,
+            )
+
+        end_at = time.perf_counter()
+        logger.info(
+            click.style(f"Send password reset mail to {to} succeeded: latency: {end_at - start_at}", fg="green")
+        )
+    except Exception:
+        logger.exception("Send password reset mail to %s failed", to)

api/templates/register_email_template_en-US.html

+<!DOCTYPE html>
+<html>
+
+<head>
+    <style>
+        body {
+            font-family: 'Arial', sans-serif;
+            line-height: 16pt;
+            color: #101828;
+            background-color: #e9ebf0;
+            margin: 0;
+            padding: 0;
+        }
+
+        .container {
+            width: 600px;
+            height: 360px;
+            margin: 40px auto;
+            padding: 36px 48px;
+            background-color: #fcfcfd;
+            border-radius: 16px;
+            border: 1px solid #ffffff;
+            box-shadow: 0 2px 4px -2px rgba(9, 9, 11, 0.08);
+        }
+
+        .header {
+            margin-bottom: 24px;
+        }
+
+        .header img {
+            max-width: 100px;
+            height: auto;
+        }
+
+        .title {
+            font-weight: 600;
+            font-size: 24px;
+            line-height: 28.8px;
+        }
+
+        .description {
+            font-size: 13px;
+            line-height: 16px;
+            color: #676f83;
+            margin-top: 12px;
+        }
+
+        .code-content {
+            padding: 16px 32px;
+            text-align: center;
+            border-radius: 16px;
+            background-color: #f2f4f7;
+            margin: 16px auto;
+        }
+
+        .code {
+            line-height: 36px;
+            font-weight: 700;
+            font-size: 30px;
+        }
+
+        .tips {
+            line-height: 16px;
+            color: #676f83;
+            font-size: 13px;
+        }
+    </style>
+</head>
+
+<body>
+    <div class="container">
+        <div class="header">
+            <!-- Optional: Add a logo or a header image here -->
+            <img src="https://assets.dify.ai/images/logo.png" alt="Dify Logo" />
+        </div>
+        <p class="title">Dify Sign-up Code</p>
+        <p class="description">Your sign-up code for Dify
+
+            Copy and paste this code, this code will only be valid for the next 5 minutes.</p>
+        <div class="code-content">
+            <span class="code">{{code}}</span>
+        </div>
+        <p class="tips">If you didn't request this code, don't worry. You can safely ignore this email.</p>
+    </div>
+</body>
+
+</html>

api/templates/register_email_template_zh-CN.html

+<!DOCTYPE html>
+<html>
+
+<head>
+    <style>
+        body {
+            font-family: 'Arial', sans-serif;
+            line-height: 16pt;
+            color: #101828;
+            background-color: #e9ebf0;
+            margin: 0;
+            padding: 0;
+        }
+
+        .container {
+            width: 600px;
+            height: 360px;
+            margin: 40px auto;
+            padding: 36px 48px;
+            background-color: #fcfcfd;
+            border-radius: 16px;
+            border: 1px solid #ffffff;
+            box-shadow: 0 2px 4px -2px rgba(9, 9, 11, 0.08);
+        }
+
+        .header {
+            margin-bottom: 24px;
+        }
+
+        .header img {
+            max-width: 100px;
+            height: auto;
+        }
+
+        .title {
+            font-weight: 600;
+            font-size: 24px;
+            line-height: 28.8px;
+        }
+
+        .description {
+            font-size: 13px;
+            line-height: 16px;
+            color: #676f83;
+            margin-top: 12px;
+        }
+
+        .code-content {
+            padding: 16px 32px;
+            text-align: center;
+            border-radius: 16px;
+            background-color: #f2f4f7;
+            margin: 16px auto;
+        }
+
+        .code {
+            line-height: 36px;
+            font-weight: 700;
+            font-size: 30px;
+        }
+
+        .tips {
+            line-height: 16px;
+            color: #676f83;
+            font-size: 13px;
+        }
+    </style>
+</head>
+
+<body>
+    <div class="container">
+        <div class="header">
+            <!-- Optional: Add a logo or a header image here -->
+            <img src="https://assets.dify.ai/images/logo.png" alt="Dify Logo" />
+        </div>
+        <p class="title">Dify 注册验证码</p>
+        <p class="description">您的 Dify 注册验证码
+
+            复制并粘贴此验证码，注意验证码仅在接下来的 5 分钟内有效。</p>
+        <div class="code-content">
+            <span class="code">{{code}}</span>
+        </div>
+        <p class="tips">如果您没有请求，请不要担心。您可以安全地忽略此电子邮件。</p>
+    </div>
+</body>
+
+</html>

api/templates/register_email_when_account_exist_template_en-US.html

+<!DOCTYPE html>
+<html>
+
+<head>
+    <style>
+        body {
+            font-family: 'Arial', sans-serif;
+            color: #101828;
+            background-color: #e9ebf0;
+            margin: 0;
+            padding: 0;
+        }
+
+        .container {
+            width: 600px;
+            margin: 80px auto 0 auto;
+            padding: 36px 48px 52px 48px;
+            background-color: #fcfcfd;
+            border-radius: 16px;
+            border: 1px solid #ffffff;
+            box-shadow: 0 3px 10px -2px rgba(9, 9, 11, 0.08), 0 2px 4px -2px rgba(9, 9, 11, 0.06);
+        }
+
+        .header {
+            margin-bottom: 40px;
+        }
+
+        .header img {
+            max-width: 100px;
+            height: auto;
+        }
+
+        .title {
+            margin-bottom: 32px;
+            font-weight: 600;
+            font-size: 24px;
+            line-height: 1.2;
+            color: #101828;
+        }
+
+        .description {
+            margin-top: 0;
+            margin-bottom: 12px;
+            font-size: 14px;
+            line-height: 20px;
+            color: #676f83;
+        }
+
+        .code-content {
+            padding: 16px 32px;
+            text-align: center;
+            border-radius: 16px;
+            background-color: #f2f4f7;
+            margin: 16px auto;
+        }
+
+        .code {
+            line-height: 36px;
+            font-weight: 700;
+            font-size: 30px;
+        }
+
+        .button {
+            display: block;
+            background: #2563eb;
+            color: #fff !important;
+            text-decoration: none;
+            font-weight: 600;
+            border-radius: 10px;
+            border: 0.5px solid rgba(16, 24, 40, 0.04);
+            height: 36px;
+            line-height: 36px;
+            text-align: center;
+            font-size: 14px;
+            margin-top: 12px;
+            margin-bottom: 20px;
+            box-shadow: 0 -6px 12px -4px rgba(9, 9, 11, 0.08) inset, 0 0 1px 0 rgba(255, 255, 255, 0.16) inset, 0 0.5px 0 0 rgba(255, 255, 255, 0.08) inset, 0 2px 2px -1px rgba(0, 0, 0, 0.12), 0 1px 1px -1px rgba(0, 0, 0, 0.12), 0 0 0 0.5px rgba(9, 9, 11, 0.05);
+        }
+
+        .reset-btn {
+            color: #155AEF;
+            text-decoration: none;
+            font-weight: 500;
+        }
+
+        .support {
+            color: #155AEF;
+            text-decoration: none;
+        }
+
+        .support:hover {
+            text-decoration: underline;
+        }
+
+        .tip {
+            margin-top: 20px;
+            color: #676F83;
+            text-align: center;
+            font-size: 12px;
+            font-weight: 400;
+            line-height: 16px;
+        }
+    </style>
+</head>
+
+<body>
+    <div class="container">
+        <div class="header">
+            <!-- Optional: Add a logo or a header image here -->
+            <img src="https://assets.dify.ai/images/logo.png" alt="Dify Logo" />
+        </div>
+        <p class="title">It looks like you’re signing up with an existing account</p>
+        <p class="description">Hi, {{account_name}}</p>
+        <p class="description">
+            We noticed you tried to sign up, but this email is already registered with an existing account.
+
+            Please log in here: </p>
+        <a href="{{ login_url }}" class="button">Log In</a>
+        <p class="description">
+            If you forgot your password, you can reset it here: <a href="{{ reset_password_url }}"
+                class="reset-btn">Reset Password</a>
+        </p>
+        <p class="description">
+            If you didn’t request this action, you can safely ignore this email.
+        </p>
+    </div>
+    <div class="tip">Please do not reply directly to this email, it is automatically sent by the system.</div>
+</body>
+
+</html>

api/templates/register_email_when_account_exist_template_zh-CN.html

+<!DOCTYPE html>
+<html>
+
+<head>
+    <style>
+        body {
+            font-family: 'Arial', sans-serif;
+            color: #101828;
+            background-color: #e9ebf0;
+            margin: 0;
+            padding: 0;
+        }
+
+        .container {
+            width: 600px;
+            margin: 80px auto 0 auto;
+            padding: 36px 48px 52px 48px;
+            background-color: #fcfcfd;
+            border-radius: 16px;
+            border: 1px solid #ffffff;
+            box-shadow: 0 3px 10px -2px rgba(9, 9, 11, 0.08), 0 2px 4px -2px rgba(9, 9, 11, 0.06);
+        }
+
+        .header {
+            margin-bottom: 40px;
+        }
+
+        .header img {
+            max-width: 100px;
+            height: auto;
+        }
+
+        .title {
+            margin-bottom: 32px;
+            font-weight: 600;
+            font-size: 24px;
+            line-height: 1.2;
+            color: #101828;
+        }
+
+        .description {
+            margin-top: 0;
+            margin-bottom: 12px;
+            font-size: 14px;
+            line-height: 20px;
+            color: #676f83;
+        }
+
+        .code-content {
+            padding: 16px 32px;
+            text-align: center;
+            border-radius: 16px;
+            background-color: #f2f4f7;
+            margin: 16px auto;
+        }
+
+        .code {
+            line-height: 36px;
+            font-weight: 700;
+            font-size: 30px;
+        }
+
+        .button {
+            display: block;
+            background: #2563eb;
+            color: #fff !important;
+            text-decoration: none;
+            font-weight: 600;
+            border-radius: 10px;
+            border: 0.5px solid rgba(16, 24, 40, 0.04);
+            height: 36px;
+            line-height: 36px;
+            text-align: center;
+            font-size: 14px;
+            margin-top: 12px;
+            margin-bottom: 20px;
+            box-shadow: 0 -6px 12px -4px rgba(9, 9, 11, 0.08) inset, 0 0 1px 0 rgba(255, 255, 255, 0.16) inset, 0 0.5px 0 0 rgba(255, 255, 255, 0.08) inset, 0 2px 2px -1px rgba(0, 0, 0, 0.12), 0 1px 1px -1px rgba(0, 0, 0, 0.12), 0 0 0 0.5px rgba(9, 9, 11, 0.05);
+        }
+
+        .reset-btn {
+            color: #155AEF;
+            text-decoration: none;
+            font-weight: 500;
+        }
+
+        .support {
+            color: #155AEF;
+            text-decoration: none;
+        }
+
+        .support:hover {
+            text-decoration: underline;
+        }
+
+        .tip {
+            margin-top: 20px;
+            color: #676F83;
+            text-align: center;
+            font-size: 12px;
+            font-weight: 400;
+            line-height: 16px;
+        }
+    </style>
+</head>
+
+<body>
+    <div class="container">
+        <div class="header">
+            <!-- Optional: Add a logo or a header image here -->
+            <img src="https://assets.dify.ai/images/logo.png" alt="Dify Logo" />
+        </div>
+        <p class="title">您似乎正在使用现有账户注册</p>
+        <p class="description">您好，{{account_name}}</p>
+        <p class="description">
+            我们注意到您尝试注册，但此电子邮件已注册。
+
+            请在此登录: </p>
+        <a href="{{ login_url }}" class="button">登录</a>
+        <p class="description">
+            如果您忘记了密码，可以在此重置: <a href="{{ reset_password_url }}" class="reset-btn">重置密码</a>
+        </p>
+        <p class="description">如果您没有请求此操作，您可以安全地忽略此电子邮件。</p>
+    </div>
+    <div class="tip">请不要直接回复此电子邮件，它是由系统自动发送的。</div>
+</body>
+
+</html>

api/templates/reset_password_mail_when_account_not_exist_no_register_template_en-US.html

+<!DOCTYPE html>
+<html>
+
+<head>
+  <style>
+    body {
+      font-family: 'Arial', sans-serif;
+      color: #101828;
+      background-color: #e9ebf0;
+      margin: 0;
+      padding: 0;
+    }
+
+    .container {
+      width: 600px;
+      margin: 80px auto 0 auto;
+      padding: 36px 48px 52px 48px;
+      background-color: #fcfcfd;
+      border-radius: 16px;
+      border: 1px solid #ffffff;
+      box-shadow: 0 3px 10px -2px rgba(9, 9, 11, 0.08), 0 2px 4px -2px rgba(9, 9, 11, 0.06);
+    }
+
+    .header {
+      margin-bottom: 40px;
+    }
+
+    .header img {
+      max-width: 100px;
+      height: auto;
+    }
+
+    .title {
+      margin-bottom: 32px;
+      font-weight: 600;
+      font-size: 24px;
+      line-height: 1.2;
+      color: #101828;
+    }
+
+    .description {
+      margin-top: 0;
+      margin-bottom: 12px;
+      font-size: 14px;
+      line-height: 20px;
+      color: #676f83;
+    }
+
+    .code-content {
+      padding: 16px 32px;
+      text-align: center;
+      border-radius: 16px;
+      background-color: #f2f4f7;
+      margin: 16px auto;
+    }
+
+    .code {
+      line-height: 36px;
+      font-weight: 700;
+      font-size: 30px;
+    }
+
+    .button {
+      display: block;
+      background: #2563eb;
+      color: #fff !important;
+      text-decoration: none;
+      font-weight: 600;
+      border-radius: 10px;
+      border: 0.5px solid rgba(16, 24, 40, 0.04);
+      height: 36px;
+      line-height: 36px;
+      text-align: center;
+      font-size: 14px;
+      margin-top: 12px;
+      margin-bottom: 20px;
+      box-shadow: 0 -6px 12px -4px rgba(9, 9, 11, 0.08) inset, 0 0 1px 0 rgba(255, 255, 255, 0.16) inset, 0 0.5px 0 0 rgba(255, 255, 255, 0.08) inset, 0 2px 2px -1px rgba(0, 0, 0, 0.12), 0 1px 1px -1px rgba(0, 0, 0, 0.12), 0 0 0 0.5px rgba(9, 9, 11, 0.05);
+    }
+
+    .reset-btn {
+      color: #155AEF;
+      text-decoration: none;
+      font-weight: 500;
+    }
+
+    .support {
+      color: #155AEF;
+      text-decoration: none;
+    }
+
+    .support:hover {
+      text-decoration: underline;
+    }
+
+    .tip {
+      margin-top: 20px;
+      color: #676F83;
+      text-align: center;
+      font-size: 12px;
+      font-weight: 400;
+      line-height: 16px;
+    }
+  </style>
+</head>
+
+<body>
+  <div class="container">
+    <div class="header">
+      <!-- Optional: Add a logo or a header image here -->
+      <img src="https://assets.dify.ai/images/logo.png" alt="Dify Logo" />
+    </div>
+    <p class="title">It looks like you’re resetting a password with an unregistered email</p>
+    <p class="description">Hi, </p>
+    <p class="description">
+      We noticed you tried to reset your password, but this email is not associated with any account.
+    </p>
+    <p class="description">If you didn’t request this action, you can safely ignore this email.</p>
+  </div>
+  <div class="tip">Please do not reply directly to this email, it is automatically sent by the system.</div>
+</body>
+
+</html>

api/templates/reset_password_mail_when_account_not_exist_no_register_template_zh-CN.html

+<!DOCTYPE html>
+<html>
+
+<head>
+  <style>
+    body {
+      font-family: 'Arial', sans-serif;
+      color: #101828;
+      background-color: #e9ebf0;
+      margin: 0;
+      padding: 0;
+    }
+
+    .container {
+      width: 600px;
+      margin: 80px auto 0 auto;
+      padding: 36px 48px 52px 48px;
+      background-color: #fcfcfd;
+      border-radius: 16px;
+      border: 1px solid #ffffff;
+      box-shadow: 0 3px 10px -2px rgba(9, 9, 11, 0.08), 0 2px 4px -2px rgba(9, 9, 11, 0.06);
+    }
+
+    .header {
+      margin-bottom: 40px;
+    }
+
+    .header img {
+      max-width: 100px;
+      height: auto;
+    }
+
+    .title {
+      margin-bottom: 32px;
+      font-weight: 600;
+      font-size: 24px;
+      line-height: 1.2;
+      color: #101828;
+    }
+
+    .description {
+      margin-top: 0;
+      margin-bottom: 12px;
+      font-size: 14px;
+      line-height: 20px;
+      color: #676f83;
+    }
+
+    .code-content {
+      padding: 16px 32px;
+      text-align: center;
+      border-radius: 16px;
+      background-color: #f2f4f7;
+      margin: 16px auto;
+    }
+
+    .code {
+      line-height: 36px;
+      font-weight: 700;
+      font-size: 30px;
+    }
+
+    .button {
+      display: block;
+      background: #2563eb;
+      color: #fff !important;
+      text-decoration: none;
+      font-weight: 600;
+      border-radius: 10px;
+      border: 0.5px solid rgba(16, 24, 40, 0.04);
+      height: 36px;
+      line-height: 36px;
+      text-align: center;
+      font-size: 14px;
+      margin-top: 12px;
+      margin-bottom: 20px;
+      box-shadow: 0 -6px 12px -4px rgba(9, 9, 11, 0.08) inset, 0 0 1px 0 rgba(255, 255, 255, 0.16) inset, 0 0.5px 0 0 rgba(255, 255, 255, 0.08) inset, 0 2px 2px -1px rgba(0, 0, 0, 0.12), 0 1px 1px -1px rgba(0, 0, 0, 0.12), 0 0 0 0.5px rgba(9, 9, 11, 0.05);
+    }
+
+    .reset-btn {
+      color: #155AEF;
+      text-decoration: none;
+      font-weight: 500;
+    }
+
+    .support {
+      color: #155AEF;
+      text-decoration: none;
+    }
+
+    .support:hover {
+      text-decoration: underline;
+    }
+
+    .tip {
+      margin-top: 20px;
+      color: #676F83;
+      text-align: center;
+      font-size: 12px;
+      font-weight: 400;
+      line-height: 16px;
+    }
+  </style>
+</head>
+
+<body>
+  <div class="container">
+    <div class="header">
+      <!-- Optional: Add a logo or a header image here -->
+      <img src="https://assets.dify.ai/images/logo.png" alt="Dify Logo" />
+    </div>
+    <p class="title">看起来您正在使用未注册的电子邮件重置密码</p>
+    <p class="description">您好，</p>
+    <p class="description">
+      我们注意到您尝试重置密码，但此电子邮件未与任何账户关联。</p>
+    <p class="description">如果您没有请求此操作，您可以安全地忽略此电子邮件。</p>
+  </div>
+  <div class="tip">请不要直接回复此电子邮件，它是由系统自动发送的。</div>
+</body>
+
+</html>

api/templates/reset_password_mail_when_account_not_exist_template_en-US.html

+<!DOCTYPE html>
+<html>
+
+<head>
+  <style>
+    body {
+      font-family: 'Arial', sans-serif;
+      color: #101828;
+      background-color: #e9ebf0;
+      margin: 0;
+      padding: 0;
+    }
+
+    .container {
+      width: 600px;
+      margin: 80px auto 0 auto;
+      padding: 36px 48px 52px 48px;
+      background-color: #fcfcfd;
+      border-radius: 16px;
+      border: 1px solid #ffffff;
+      box-shadow: 0 3px 10px -2px rgba(9, 9, 11, 0.08), 0 2px 4px -2px rgba(9, 9, 11, 0.06);
+    }
+
+    .header {
+      margin-bottom: 40px;
+    }
+
+    .header img {
+      max-width: 100px;
+      height: auto;
+    }
+
+    .title {
+      margin-bottom: 32px;
+      font-weight: 600;
+      font-size: 24px;
+      line-height: 1.2;
+      color: #101828;
+    }
+
+    .description {
+      margin-top: 0;
+      margin-bottom: 12px;
+      font-size: 14px;
+      line-height: 20px;
+      color: #676f83;
+    }
+
+    .code-content {
+      padding: 16px 32px;
+      text-align: center;
+      border-radius: 16px;
+      background-color: #f2f4f7;
+      margin: 16px auto;
+    }
+
+    .code {
+      line-height: 36px;
+      font-weight: 700;
+      font-size: 30px;
+    }
+
+    .button {
+      display: block;
+      background: #2563eb;
+      color: #fff !important;
+      text-decoration: none;
+      font-weight: 600;
+      border-radius: 10px;
+      border: 0.5px solid rgba(16, 24, 40, 0.04);
+      height: 36px;
+      line-height: 36px;
+      text-align: center;
+      font-size: 14px;
+      margin-top: 12px;
+      margin-bottom: 20px;
+      box-shadow: 0 -6px 12px -4px rgba(9, 9, 11, 0.08) inset, 0 0 1px 0 rgba(255, 255, 255, 0.16) inset, 0 0.5px 0 0 rgba(255, 255, 255, 0.08) inset, 0 2px 2px -1px rgba(0, 0, 0, 0.12), 0 1px 1px -1px rgba(0, 0, 0, 0.12), 0 0 0 0.5px rgba(9, 9, 11, 0.05);
+    }
+
+    .reset-btn {
+      color: #155AEF;
+      text-decoration: none;
+      font-weight: 500;
+    }
+
+    .support {
+      color: #155AEF;
+      text-decoration: none;
+    }
+
+    .support:hover {
+      text-decoration: underline;
+    }
+
+    .tip {
+      margin-top: 20px;
+      color: #676F83;
+      text-align: center;
+      font-size: 12px;
+      font-weight: 400;
+      line-height: 16px;
+    }
+  </style>
+</head>
+
+<body>
+  <div class="container">
+    <div class="header">
+      <!-- Optional: Add a logo or a header image here -->
+      <img src="https://assets.dify.ai/images/logo.png" alt="Dify Logo" />
+    </div>
+    <p class="title">It looks like you’re resetting a password with an unregistered email</p>
+    <p class="description">Hi, </p>
+    <p class="description">
+      We noticed you tried to reset your password, but this email is not associated with any account.
+
+      Please sign up here: </p>
+    <a href="{{ sign_up_url }}" class="button">Sign Up</a>
+    <p class="description">If you didn’t request this action, you can safely ignore this email.</p>
+  </div>
+  <div class="tip">Please do not reply directly to this email, it is automatically sent by the system.</div>
+</body>
+
+</html>

api/templates/reset_password_mail_when_account_not_exist_template_zh-CN.html

+<!DOCTYPE html>
+<html>
+
+<head>
+  <style>
+    body {
+      font-family: 'Arial', sans-serif;
+      color: #101828;
+      background-color: #e9ebf0;
+      margin: 0;
+      padding: 0;
+    }
+
+    .container {
+      width: 600px;
+      margin: 80px auto 0 auto;
+      padding: 36px 48px 52px 48px;
+      background-color: #fcfcfd;
+      border-radius: 16px;
+      border: 1px solid #ffffff;
+      box-shadow: 0 3px 10px -2px rgba(9, 9, 11, 0.08), 0 2px 4px -2px rgba(9, 9, 11, 0.06);
+    }
+
+    .header {
+      margin-bottom: 40px;
+    }
+
+    .header img {
+      max-width: 100px;
+      height: auto;
+    }
+
+    .title {
+      margin-bottom: 32px;
+      font-weight: 600;
+      font-size: 24px;
+      line-height: 1.2;
+      color: #101828;
+    }
+
+    .description {
+      margin-top: 0;
+      margin-bottom: 12px;
+      font-size: 14px;
+      line-height: 20px;
+      color: #676f83;
+    }
+
+    .code-content {
+      padding: 16px 32px;
+      text-align: center;
+      border-radius: 16px;
+      background-color: #f2f4f7;
+      margin: 16px auto;
+    }
+
+    .code {
+      line-height: 36px;
+      font-weight: 700;
+      font-size: 30px;
+    }
+
+    .button {
+      display: block;
+      background: #2563eb;
+      color: #fff !important;
+      text-decoration: none;
+      font-weight: 600;
+      border-radius: 10px;
+      border: 0.5px solid rgba(16, 24, 40, 0.04);
+      height: 36px;
+      line-height: 36px;
+      text-align: center;
+      font-size: 14px;
+      margin-top: 12px;
+      margin-bottom: 20px;
+      box-shadow: 0 -6px 12px -4px rgba(9, 9, 11, 0.08) inset, 0 0 1px 0 rgba(255, 255, 255, 0.16) inset, 0 0.5px 0 0 rgba(255, 255, 255, 0.08) inset, 0 2px 2px -1px rgba(0, 0, 0, 0.12), 0 1px 1px -1px rgba(0, 0, 0, 0.12), 0 0 0 0.5px rgba(9, 9, 11, 0.05);
+    }
+
+    .reset-btn {
+      color: #155AEF;
+      text-decoration: none;
+      font-weight: 500;
+    }
+
+    .support {
+      color: #155AEF;
+      text-decoration: none;
+    }
+
+    .support:hover {
+      text-decoration: underline;
+    }
+
+    .tip {
+      margin-top: 20px;
+      color: #676F83;
+      text-align: center;
+      font-size: 12px;
+      font-weight: 400;
+      line-height: 16px;
+    }
+  </style>
+</head>
+
+<body>
+  <div class="container">
+    <div class="header">
+      <!-- Optional: Add a logo or a header image here -->
+      <img src="https://assets.dify.ai/images/logo.png" alt="Dify Logo" />
+    </div>
+    <p class="title">看起来您正在使用未注册的电子邮件重置密码</p>
+    <p class="description">您好, </p>
+    <p class="description">
+      我们注意到您尝试重置密码，但此电子邮件未与任何账户关联。
+
+      请在此注册: </p>
+    <p class="description">
+      <a href="{{ sign_up_url }}" class="button">注册</a>
+    </p>
+    <p class="description">如果您没有请求此操作，您可以安全地忽略此电子邮件。</p>
+  </div>
+  <div class="tip">请不要直接回复此电子邮件，它是由系统自动发送的。</div>
+</body>
+
+</html>

api/templates/without-brand/register_email_template_en-US.html

+<!DOCTYPE html>
+<html>
+
+<head>
+  <style>
+    body {
+      font-family: 'Arial', sans-serif;
+      line-height: 16pt;
+      color: #101828;
+      background-color: #e9ebf0;
+      margin: 0;
+      padding: 0;
+    }
+
+    .container {
+      width: 600px;
+      height: 360px;
+      margin: 40px auto;
+      padding: 36px 48px;
+      background-color: #fcfcfd;
+      border-radius: 16px;
+      border: 1px solid #ffffff;
+      box-shadow: 0 2px 4px -2px rgba(9, 9, 11, 0.08);
+    }
+
+    .header {
+      margin-bottom: 24px;
+    }
+
+    .header img {
+      max-width: 100px;
+      height: auto;
+    }
+
+    .title {
+      font-weight: 600;
+      font-size: 24px;
+      line-height: 28.8px;
+    }
+
+    .description {
+      font-size: 13px;
+      line-height: 16px;
+      color: #676f83;
+      margin-top: 12px;
+    }
+
+    .code-content {
+      padding: 16px 32px;
+      text-align: center;
+      border-radius: 16px;
+      background-color: #f2f4f7;
+      margin: 16px auto;
+    }
+
+    .code {
+      line-height: 36px;
+      font-weight: 700;
+      font-size: 30px;
+    }
+
+    .tips {
+      line-height: 16px;
+      color: #676f83;
+      font-size: 13px;
+    }
+  </style>
+</head>
+
+<body>
+  <div class="container">
+    <p class="title">{{application_title}} Sign-up Code</p>
+    <p class="description">Your sign-up code
+
+      Copy and paste this code, this code will only be valid for the next 5 minutes.</p>
+    <div class="code-content">
+      <span class="code">{{code}}</span>
+    </div>
+    <p class="tips">If you didn't request this code, don't worry. You can safely ignore this email.</p>
+  </div>
+</body>
+
+</html>

api/templates/without-brand/register_email_template_zh-CN.html

+<!DOCTYPE html>
+<html>
+
+<head>
+  <style>
+    body {
+      font-family: 'Arial', sans-serif;
+      line-height: 16pt;
+      color: #101828;
+      background-color: #e9ebf0;
+      margin: 0;
+      padding: 0;
+    }
+
+    .container {
+      width: 600px;
+      height: 360px;
+      margin: 40px auto;
+      padding: 36px 48px;
+      background-color: #fcfcfd;
+      border-radius: 16px;
+      border: 1px solid #ffffff;
+      box-shadow: 0 2px 4px -2px rgba(9, 9, 11, 0.08);
+    }
+
+    .header {
+      margin-bottom: 24px;
+    }
+
+    .header img {
+      max-width: 100px;
+      height: auto;
+    }
+
+    .title {
+      font-weight: 600;
+      font-size: 24px;
+      line-height: 28.8px;
+    }
+
+    .description {
+      font-size: 13px;
+      line-height: 16px;
+      color: #676f83;
+      margin-top: 12px;
+    }
+
+    .code-content {
+      padding: 16px 32px;
+      text-align: center;
+      border-radius: 16px;
+      background-color: #f2f4f7;
+      margin: 16px auto;
+    }
+
+    .code {
+      line-height: 36px;
+      font-weight: 700;
+      font-size: 30px;
+    }
+
+    .tips {
+      line-height: 16px;
+      color: #676f83;
+      font-size: 13px;
+    }
+  </style>
+</head>
+
+<body>
+  <div class="container">
+    <p class="title">{{application_title}} 注册验证码</p>
+    <p class="description">您的 {{application_title}} 注册验证码
+
+      复制并粘贴此验证码，注意验证码仅在接下来的 5 分钟内有效。</p>
+    <div class="code-content">
+      <span class="code">{{code}}</span>
+    </div>
+    <p class="tips">如果您没有请求此验证码，请不要担心。您可以安全地忽略此电子邮件。</p>
+  </div>
+</body>
+
+</html>

api/templates/without-brand/register_email_when_account_exist_template_en-US.html

+<!DOCTYPE html>
+<html>
+
+<head>
+    <style>
+        body {
+            font-family: 'Arial', sans-serif;
+            color: #101828;
+            background-color: #e9ebf0;
+            margin: 0;
+            padding: 0;
+        }
+
+        .container {
+            width: 600px;
+            margin: 80px auto 0 auto;
+            padding: 36px 48px 52px 48px;
+            background-color: #fcfcfd;
+            border-radius: 16px;
+            border: 1px solid #ffffff;
+            box-shadow: 0 3px 10px -2px rgba(9, 9, 11, 0.08), 0 2px 4px -2px rgba(9, 9, 11, 0.06);
+        }
+
+        .header {
+            margin-bottom: 40px;
+        }
+
+        .header img {
+            max-width: 100px;
+            height: auto;
+        }
+
+        .title {
+            margin-bottom: 32px;
+            font-weight: 600;
+            font-size: 24px;
+            line-height: 1.2;
+            color: #101828;
+        }
+
+        .description {
+            margin-top: 0;
+            margin-bottom: 12px;
+            font-size: 14px;
+            line-height: 20px;
+            color: #676f83;
+        }
+
+        .code-content {
+            padding: 16px 32px;
+            text-align: center;
+            border-radius: 16px;
+            background-color: #f2f4f7;
+            margin: 16px auto;
+        }
+
+        .code {
+            line-height: 36px;
+            font-weight: 700;
+            font-size: 30px;
+        }
+
+        .button {
+            display: block;
+            background: #2563eb;
+            color: #fff !important;
+            text-decoration: none;
+            font-weight: 600;
+            border-radius: 10px;
+            border: 0.5px solid rgba(16, 24, 40, 0.04);
+            height: 36px;
+            line-height: 36px;
+            text-align: center;
+            font-size: 14px;
+            margin-top: 12px;
+            margin-bottom: 20px;
+            box-shadow: 0 -6px 12px -4px rgba(9, 9, 11, 0.08) inset, 0 0 1px 0 rgba(255, 255, 255, 0.16) inset, 0 0.5px 0 0 rgba(255, 255, 255, 0.08) inset, 0 2px 2px -1px rgba(0, 0, 0, 0.12), 0 1px 1px -1px rgba(0, 0, 0, 0.12), 0 0 0 0.5px rgba(9, 9, 11, 0.05);
+        }
+
+        .reset-btn {
+            color: #155AEF;
+            text-decoration: none;
+            font-weight: 500;
+        }
+
+        .support {
+            color: #155AEF;
+            text-decoration: none;
+        }
+
+        .support:hover {
+            text-decoration: underline;
+        }
+
+        .tip {
+            margin-top: 20px;
+            color: #676F83;
+            text-align: center;
+            font-size: 12px;
+            font-weight: 400;
+            line-height: 16px;
+        }
+    </style>
+</head>
+
+<body>
+    <div class="container">
+        <p class="title">It looks like you’re signing up with an existing account</p>
+        <p class="description">Hi, {{account_name}}</p>
+        <p class="description">
+            We noticed you tried to sign up, but this email is already registered with an existing account.
+
+            Please log in here: </p>
+        <a href="{{ login_url }}" class="button">Log In</a>
+        <p class="description">
+            If you forgot your password, you can reset it here: <a href="{{ reset_password_url }}"
+                class="reset-btn">Reset Password</a>
+        </p>
+        <p class="description">
+            If you didn’t request this action, you can safely ignore this email.
+        </p>
+    </div>
+    <div class="tip">Please do not reply directly to this email, it is automatically sent by the system.</div>
+</body>
+
+</html>

api/templates/without-brand/register_email_when_account_exist_template_zh-CN.html

+<!DOCTYPE html>
+<html>
+
+<head>
+    <style>
+        body {
+            font-family: 'Arial', sans-serif;
+            color: #101828;
+            background-color: #e9ebf0;
+            margin: 0;
+            padding: 0;
+        }
+
+        .container {
+            width: 600px;
+            margin: 80px auto 0 auto;
+            padding: 36px 48px 52px 48px;
+            background-color: #fcfcfd;
+            border-radius: 16px;
+            border: 1px solid #ffffff;
+            box-shadow: 0 3px 10px -2px rgba(9, 9, 11, 0.08), 0 2px 4px -2px rgba(9, 9, 11, 0.06);
+        }
+
+        .header {
+            margin-bottom: 40px;
+        }
+
+        .header img {
+            max-width: 100px;
+            height: auto;
+        }
+
+        .title {
+            margin-bottom: 32px;
+            font-weight: 600;
+            font-size: 24px;
+            line-height: 1.2;
+            color: #101828;
+        }
+
+        .description {
+            margin-top: 0;
+            margin-bottom: 12px;
+            font-size: 14px;
+            line-height: 20px;
+            color: #676f83;
+        }
+
+        .code-content {
+            padding: 16px 32px;
+            text-align: center;
+            border-radius: 16px;
+            background-color: #f2f4f7;
+            margin: 16px auto;
+        }
+
+        .code {
+            line-height: 36px;
+            font-weight: 700;
+            font-size: 30px;
+        }
+
+        .button {
+            display: block;
+            background: #2563eb;
+            color: #fff !important;
+            text-decoration: none;
+            font-weight: 600;
+            border-radius: 10px;
+            border: 0.5px solid rgba(16, 24, 40, 0.04);
+            height: 36px;
+            line-height: 36px;
+            text-align: center;
+            font-size: 14px;
+            margin-top: 12px;
+            margin-bottom: 20px;
+            box-shadow: 0 -6px 12px -4px rgba(9, 9, 11, 0.08) inset, 0 0 1px 0 rgba(255, 255, 255, 0.16) inset, 0 0.5px 0 0 rgba(255, 255, 255, 0.08) inset, 0 2px 2px -1px rgba(0, 0, 0, 0.12), 0 1px 1px -1px rgba(0, 0, 0, 0.12), 0 0 0 0.5px rgba(9, 9, 11, 0.05);
+        }
+
+        .reset-btn {
+            color: #155AEF;
+            text-decoration: none;
+            font-weight: 500;
+        }
+
+        .support {
+            color: #155AEF;
+            text-decoration: none;
+        }
+
+        .support:hover {
+            text-decoration: underline;
+        }
+
+        .tip {
+            margin-top: 20px;
+            color: #676F83;
+            text-align: center;
+            font-size: 12px;
+            font-weight: 400;
+            line-height: 16px;
+        }
+    </style>
+</head>
+
+<body>
+    <div class="container">
+        <p class="title">您似乎正在使用现有账户注册</p>
+        <p class="description">您好，{{account_name}}</p>
+        <p class="description">
+            我们注意到您尝试注册，但此电子邮件已注册。
+
+            请在此登录: </p>
+        <a href="{{ login_url }}" class="button">登录</a>
+        <p class="description">
+            如果您忘记了密码，可以在此重置: <a href="{{ reset_password_url }}" class="reset-btn">重置密码</a>
+        </p>
+        <p class="description">如果您没有请求此操作，您可以安全地忽略此电子邮件。</p>
+    </div>
+    <div class="tip">请不要直接回复此电子邮件，它是由系统自动发送的。</div>
+</body>
+
+</html>

api/templates/without-brand/reset_password_mail_when_account_not_exist_no_register_template_en-US.html

+<!DOCTYPE html>
+<html>
+
+<head>
+  <style>
+    body {
+      font-family: 'Arial', sans-serif;
+      color: #101828;
+      background-color: #e9ebf0;
+      margin: 0;
+      padding: 0;
+    }
+
+    .container {
+      width: 600px;
+      margin: 80px auto 0 auto;
+      padding: 36px 48px 52px 48px;
+      background-color: #fcfcfd;
+      border-radius: 16px;
+      border: 1px solid #ffffff;
+      box-shadow: 0 3px 10px -2px rgba(9, 9, 11, 0.08), 0 2px 4px -2px rgba(9, 9, 11, 0.06);
+    }
+
+    .header {
+      margin-bottom: 40px;
+    }
+
+    .header img {
+      max-width: 100px;
+      height: auto;
+    }
+
+    .title {
+      margin-bottom: 32px;
+      font-weight: 600;
+      font-size: 24px;
+      line-height: 1.2;
+      color: #101828;
+    }
+
+    .description {
+      margin-top: 0;
+      margin-bottom: 12px;
+      font-size: 14px;
+      line-height: 20px;
+      color: #676f83;
+    }
+
+    .code-content {
+      padding: 16px 32px;
+      text-align: center;
+      border-radius: 16px;
+      background-color: #f2f4f7;
+      margin: 16px auto;
+    }
+
+    .code {
+      line-height: 36px;
+      font-weight: 700;
+      font-size: 30px;
+    }
+
+    .button {
+      display: block;
+      background: #2563eb;
+      color: #fff !important;
+      text-decoration: none;
+      font-weight: 600;
+      border-radius: 10px;
+      border: 0.5px solid rgba(16, 24, 40, 0.04);
+      height: 36px;
+      line-height: 36px;
+      text-align: center;
+      font-size: 14px;
+      margin-top: 12px;
+      margin-bottom: 20px;
+      box-shadow: 0 -6px 12px -4px rgba(9, 9, 11, 0.08) inset, 0 0 1px 0 rgba(255, 255, 255, 0.16) inset, 0 0.5px 0 0 rgba(255, 255, 255, 0.08) inset, 0 2px 2px -1px rgba(0, 0, 0, 0.12), 0 1px 1px -1px rgba(0, 0, 0, 0.12), 0 0 0 0.5px rgba(9, 9, 11, 0.05);
+    }
+
+    .reset-btn {
+      color: #155AEF;
+      text-decoration: none;
+      font-weight: 500;
+    }
+
+    .support {
+      color: #155AEF;
+      text-decoration: none;
+    }
+
+    .support:hover {
+      text-decoration: underline;
+    }
+
+    .tip {
+      margin-top: 20px;
+      color: #676F83;
+      text-align: center;
+      font-size: 12px;
+      font-weight: 400;
+      line-height: 16px;
+    }
+  </style>
+</head>
+
+<body>
+  <div class="container">
+    <p class="title">It looks like you’re resetting a password with an unregistered email</p>
+    <p class="description">Hi,</p>
+    <p class="description">
+      We noticed you tried to reset your password, but this email is not associated with any account.
+    </p>
+    <p class="description">If you didn’t request this action, you can safely ignore this email.</p>
+  </div>
+  <div class="tip">Please do not reply directly to this email, it is automatically sent by the system.</div>s
+</body>
+
+</html>

api/templates/without-brand/reset_password_mail_when_account_not_exist_no_register_template_zh-CN.html

+<!DOCTYPE html>
+<html>
+
+<head>
+  <style>
+    body {
+      font-family: 'Arial', sans-serif;
+      color: #101828;
+      background-color: #e9ebf0;
+      margin: 0;
+      padding: 0;
+    }
+
+    .container {
+      width: 600px;
+      margin: 80px auto 0 auto;
+      padding: 36px 48px 52px 48px;
+      background-color: #fcfcfd;
+      border-radius: 16px;
+      border: 1px solid #ffffff;
+      box-shadow: 0 3px 10px -2px rgba(9, 9, 11, 0.08), 0 2px 4px -2px rgba(9, 9, 11, 0.06);
+    }
+
+    .header {
+      margin-bottom: 40px;
+    }
+
+    .header img {
+      max-width: 100px;
+      height: auto;
+    }
+
+    .title {
+      margin-bottom: 32px;
+      font-weight: 600;
+      font-size: 24px;
+      line-height: 1.2;
+      color: #101828;
+    }
+
+    .description {
+      margin-top: 0;
+      margin-bottom: 12px;
+      font-size: 14px;
+      line-height: 20px;
+      color: #676f83;
+    }
+
+    .code-content {
+      padding: 16px 32px;
+      text-align: center;
+      border-radius: 16px;
+      background-color: #f2f4f7;
+      margin: 16px auto;
+    }
+
+    .code {
+      line-height: 36px;
+      font-weight: 700;
+      font-size: 30px;
+    }
+
+    .button {
+      display: block;
+      background: #2563eb;
+      color: #fff !important;
+      text-decoration: none;
+      font-weight: 600;
+      border-radius: 10px;
+      border: 0.5px solid rgba(16, 24, 40, 0.04);
+      height: 36px;
+      line-height: 36px;
+      text-align: center;
+      font-size: 14px;
+      margin-top: 12px;
+      margin-bottom: 20px;
+      box-shadow: 0 -6px 12px -4px rgba(9, 9, 11, 0.08) inset, 0 0 1px 0 rgba(255, 255, 255, 0.16) inset, 0 0.5px 0 0 rgba(255, 255, 255, 0.08) inset, 0 2px 2px -1px rgba(0, 0, 0, 0.12), 0 1px 1px -1px rgba(0, 0, 0, 0.12), 0 0 0 0.5px rgba(9, 9, 11, 0.05);
+    }
+
+    .reset-btn {
+      color: #155AEF;
+      text-decoration: none;
+      font-weight: 500;
+    }
+
+    .support {
+      color: #155AEF;
+      text-decoration: none;
+    }
+
+    .support:hover {
+      text-decoration: underline;
+    }
+
+    .tip {
+      margin-top: 20px;
+      color: #676F83;
+      text-align: center;
+      font-size: 12px;
+      font-weight: 400;
+      line-height: 16px;
+    }
+  </style>
+</head>
+
+<body>
+  <div class="container">
+    <p class="title">看起来您正在使用未注册的电子邮件重置密码</p>
+    <p class="description">您好，</p>
+    <p class="description">
+      我们注意到您尝试重置密码，但此电子邮件未与任何账户关联。
+    </p>
+    <p class="description">如果您没有请求此操作，您可以安全地忽略此电子邮件。</p>
+  </div>
+  <div class="tip">请不要直接回复此电子邮件，它是由系统自动发送的。</div>
+</body>
+
+</html>

api/templates/without-brand/reset_password_mail_when_account_not_exist_template_en-US.html

+<!DOCTYPE html>
+<html>
+
+<head>
+  <style>
+    body {
+      font-family: 'Arial', sans-serif;
+      color: #101828;
+      background-color: #e9ebf0;
+      margin: 0;
+      padding: 0;
+    }
+
+    .container {
+      width: 600px;
+      margin: 80px auto 0 auto;
+      padding: 36px 48px 52px 48px;
+      background-color: #fcfcfd;
+      border-radius: 16px;
+      border: 1px solid #ffffff;
+      box-shadow: 0 3px 10px -2px rgba(9, 9, 11, 0.08), 0 2px 4px -2px rgba(9, 9, 11, 0.06);
+    }
+
+    .header {
+      margin-bottom: 40px;
+    }
+
+    .header img {
+      max-width: 100px;
+      height: auto;
+    }
+
+    .title {
+      margin-bottom: 32px;
+      font-weight: 600;
+      font-size: 24px;
+      line-height: 1.2;
+      color: #101828;
+    }
+
+    .description {
+      margin-top: 0;
+      margin-bottom: 12px;
+      font-size: 14px;
+      line-height: 20px;
+      color: #676f83;
+    }
+
+    .code-content {
+      padding: 16px 32px;
+      text-align: center;
+      border-radius: 16px;
+      background-color: #f2f4f7;
+      margin: 16px auto;
+    }
+
+    .code {
+      line-height: 36px;
+      font-weight: 700;
+      font-size: 30px;
+    }
+
+    .button {
+      display: block;
+      background: #2563eb;
+      color: #fff !important;
+      text-decoration: none;
+      font-weight: 600;
+      border-radius: 10px;
+      border: 0.5px solid rgba(16, 24, 40, 0.04);
+      height: 36px;
+      line-height: 36px;
+      text-align: center;
+      font-size: 14px;
+      margin-top: 12px;
+      margin-bottom: 20px;
+      box-shadow: 0 -6px 12px -4px rgba(9, 9, 11, 0.08) inset, 0 0 1px 0 rgba(255, 255, 255, 0.16) inset, 0 0.5px 0 0 rgba(255, 255, 255, 0.08) inset, 0 2px 2px -1px rgba(0, 0, 0, 0.12), 0 1px 1px -1px rgba(0, 0, 0, 0.12), 0 0 0 0.5px rgba(9, 9, 11, 0.05);
+    }
+
+    .reset-btn {
+      color: #155AEF;
+      text-decoration: none;
+      font-weight: 500;
+    }
+
+    .support {
+      color: #155AEF;
+      text-decoration: none;
+    }
+
+    .support:hover {
+      text-decoration: underline;
+    }
+
+    .tip {
+      margin-top: 20px;
+      color: #676F83;
+      text-align: center;
+      font-size: 12px;
+      font-weight: 400;
+      line-height: 16px;
+    }
+  </style>
+</head>
+
+<body>
+  <div class="container">
+    <p class="title">It looks like you’re resetting a password with an unregistered email</p>
+    <p class="description">Hi,</p>
+    <p class="description">
+      We noticed you tried to reset your password, but this email is not associated with any account.
+
+      Please sign up here: </p>
+    <a href="{{ sign_up_url }}" class="button">Sign Up</a>
+    <p class="description">If you didn’t request this action, you can safely ignore this email.</p>
+
+  </div>
+  <div class="tip">Please do not reply directly to this email, it is automatically sent by the system.</div>
+</body>
+
+</html>

api/templates/without-brand/reset_password_mail_when_account_not_exist_template_zh-CN.html

+<!DOCTYPE html>
+<html>
+
+<head>
+  <style>
+    body {
+      font-family: 'Arial', sans-serif;
+      color: #101828;
+      background-color: #e9ebf0;
+      margin: 0;
+      padding: 0;
+    }
+
+    .container {
+      width: 600px;
+      margin: 80px auto 0 auto;
+      padding: 36px 48px 52px 48px;
+      background-color: #fcfcfd;
+      border-radius: 16px;
+      border: 1px solid #ffffff;
+      box-shadow: 0 3px 10px -2px rgba(9, 9, 11, 0.08), 0 2px 4px -2px rgba(9, 9, 11, 0.06);
+    }
+
+    .header {
+      margin-bottom: 40px;
+    }
+
+    .header img {
+      max-width: 100px;
+      height: auto;
+    }
+
+    .title {
+      margin-bottom: 32px;
+      font-weight: 600;
+      font-size: 24px;
+      line-height: 1.2;
+      color: #101828;
+    }
+
+    .description {
+      margin-top: 0;
+      margin-bottom: 12px;
+      font-size: 14px;
+      line-height: 20px;
+      color: #676f83;
+    }
+
+    .code-content {
+      padding: 16px 32px;
+      text-align: center;
+      border-radius: 16px;
+      background-color: #f2f4f7;
+      margin: 16px auto;
+    }
+
+    .code {
+      line-height: 36px;
+      font-weight: 700;
+      font-size: 30px;
+    }
+
+    .button {
+      display: block;
+      background: #2563eb;
+      color: #fff !important;
+      text-decoration: none;
+      font-weight: 600;
+      border-radius: 10px;
+      border: 0.5px solid rgba(16, 24, 40, 0.04);
+      height: 36px;
+      line-height: 36px;
+      text-align: center;
+      font-size: 14px;
+      margin-top: 12px;
+      margin-bottom: 20px;
+      box-shadow: 0 -6px 12px -4px rgba(9, 9, 11, 0.08) inset, 0 0 1px 0 rgba(255, 255, 255, 0.16) inset, 0 0.5px 0 0 rgba(255, 255, 255, 0.08) inset, 0 2px 2px -1px rgba(0, 0, 0, 0.12), 0 1px 1px -1px rgba(0, 0, 0, 0.12), 0 0 0 0.5px rgba(9, 9, 11, 0.05);
+    }
+
+    .reset-btn {
+      color: #155AEF;
+      text-decoration: none;
+      font-weight: 500;
+    }
+
+    .support {
+      color: #155AEF;
+      text-decoration: none;
+    }
+
+    .support:hover {
+      text-decoration: underline;
+    }
+
+    .tip {
+      margin-top: 20px;
+      color: #676F83;
+      text-align: center;
+      font-size: 12px;
+      font-weight: 400;
+      line-height: 16px;
+    }
+  </style>
+</head>
+
+<body>
+  <div class="container">
+    <p class="title">看起来您正在使用未注册的电子邮件重置密码</p>
+    <p class="description">您好, </p>
+    <p class="description">
+      我们注意到您尝试重置密码，但此电子邮件未与任何账户关联。
+
+      请在此注册: </p>
+    <a href="{{ sign_up_url }}" class="button">注册</a>
+    <p class="description">如果您没有请求此操作，您可以安全地忽略此电子邮件。</p>
+  </div>
+  <div class="tip">请不要直接回复此电子邮件，它是由系统自动发送的。</div>
+</body>
+
+</html>

api/tests/integration_tests/.env.example

 
 # Reset password token expiry minutes
 RESET_PASSWORD_TOKEN_EXPIRY_MINUTES=5
+EMAIL_REGISTER_TOKEN_EXPIRY_MINUTES=5
 CHANGE_EMAIL_TOKEN_EXPIRY_MINUTES=5
 OWNER_TRANSFER_TOKEN_EXPIRY_MINUTES=5
 

api/tests/test_containers_integration_tests/services/test_account_service.py

 from services.errors.account import (
     AccountAlreadyInTenantError,
     AccountLoginError,
-    AccountNotFoundError,
     AccountPasswordError,
     AccountRegisterError,
     CurrentPasswordIncorrectError,
         fake = Faker()
         email = fake.email()
         password = fake.password(length=12)
-        with pytest.raises(AccountNotFoundError):
+        with pytest.raises(AccountPasswordError):
             AccountService.authenticate(email, password)
 
     def test_authenticate_banned_account(self, db_session_with_containers, mock_external_service_dependencies):

api/tests/unit_tests/controllers/console/auth/test_authentication_security.py

 import services.errors.account
 from controllers.console.auth.error import AuthenticationFailedError
 from controllers.console.auth.login import LoginApi
-from controllers.console.error import AccountNotFound
 
 
 class TestAuthenticationSecurity:
     @patch("controllers.console.auth.login.FeatureService.get_system_features")
     @patch("controllers.console.auth.login.AccountService.is_login_error_rate_limit")
     @patch("controllers.console.auth.login.AccountService.authenticate")
-    @patch("controllers.console.auth.login.AccountService.send_reset_password_email")
+    @patch("controllers.console.auth.login.AccountService.add_login_error_rate_limit")
     @patch("controllers.console.auth.login.dify_config.BILLING_ENABLED", False)
     @patch("controllers.console.auth.login.RegisterService.get_invitation_if_token_valid")
     def test_login_invalid_email_with_registration_allowed(
-        self, mock_get_invitation, mock_send_email, mock_authenticate, mock_is_rate_limit, mock_features, mock_db
+        self, mock_get_invitation, mock_add_rate_limit, mock_authenticate, mock_is_rate_limit, mock_features, mock_db
     ):
-        """Test that invalid email sends reset password email when registration is allowed."""
+        """Test that invalid email raises AuthenticationFailedError when account not found."""
         # Arrange
         mock_is_rate_limit.return_value = False
         mock_get_invitation.return_value = None
-        mock_authenticate.side_effect = services.errors.account.AccountNotFoundError("Account not found")
+        mock_authenticate.side_effect = services.errors.account.AccountPasswordError("Invalid email or password.")
         mock_db.session.query.return_value.first.return_value = MagicMock()  # Mock setup exists
         mock_features.return_value.is_allow_register = True
-        mock_send_email.return_value = "token123"
 
         # Act
         with self.app.test_request_context(
             "/login", method="POST", json={"email": "nonexistent@example.com", "password": "WrongPass123!"}
         ):
             login_api = LoginApi()
-            result = login_api.post()
 
-        # Assert
-        assert result == {"result": "fail", "data": "token123", "code": "account_not_found"}
-        mock_send_email.assert_called_once_with(email="nonexistent@example.com", language="en-US")
+            # Assert
+            with pytest.raises(AuthenticationFailedError) as exc_info:
+                login_api.post()
+
+        assert exc_info.value.error_code == "authentication_failed"
+        assert exc_info.value.description == "Invalid email or password."
+        mock_add_rate_limit.assert_called_once_with("nonexistent@example.com")
 
     @patch("controllers.console.wraps.db")
     @patch("controllers.console.auth.login.AccountService.is_login_error_rate_limit")
     @patch("controllers.console.auth.login.FeatureService.get_system_features")
     @patch("controllers.console.auth.login.AccountService.is_login_error_rate_limit")
     @patch("controllers.console.auth.login.AccountService.authenticate")
+    @patch("controllers.console.auth.login.AccountService.add_login_error_rate_limit")
     @patch("controllers.console.auth.login.dify_config.BILLING_ENABLED", False)
     @patch("controllers.console.auth.login.RegisterService.get_invitation_if_token_valid")
     def test_login_invalid_email_with_registration_disabled(
-        self, mock_get_invitation, mock_authenticate, mock_is_rate_limit, mock_features, mock_db
+        self, mock_get_invitation, mock_add_rate_limit, mock_authenticate, mock_is_rate_limit, mock_features, mock_db
     ):
-        """Test that invalid email raises AccountNotFound when registration is disabled."""
+        """Test that invalid email raises AuthenticationFailedError when account not found."""
         # Arrange
         mock_is_rate_limit.return_value = False
         mock_get_invitation.return_value = None
-        mock_authenticate.side_effect = services.errors.account.AccountNotFoundError("Account not found")
+        mock_authenticate.side_effect = services.errors.account.AccountPasswordError("Invalid email or password.")
         mock_db.session.query.return_value.first.return_value = MagicMock()  # Mock setup exists
         mock_features.return_value.is_allow_register = False
 
             login_api = LoginApi()
 
             # Assert
-            with pytest.raises(AccountNotFound) as exc_info:
+            with pytest.raises(AuthenticationFailedError) as exc_info:
                 login_api.post()
 
-        assert exc_info.value.error_code == "account_not_found"
+        assert exc_info.value.error_code == "authentication_failed"
+        assert exc_info.value.description == "Invalid email or password."
+        mock_add_rate_limit.assert_called_once_with("nonexistent@example.com")
 
     @patch("controllers.console.wraps.db")
     @patch("controllers.console.auth.login.FeatureService.get_system_features")

api/tests/unit_tests/controllers/console/auth/test_oauth.py

 )
 from libs.oauth import OAuthUserInfo
 from models.account import AccountStatus
-from services.errors.account import AccountNotFoundError
+from services.errors.account import AccountRegisterError
 
 
 class TestGetOAuthProviders:
 
         with app.test_request_context(headers={"Accept-Language": "en-US,en;q=0.9"}):
             if not allow_register and not existing_account:
-                with pytest.raises(AccountNotFoundError):
+                with pytest.raises(AccountRegisterError):
                     _generate_account("github", user_info)
             else:
                 result = _generate_account("github", user_info)

api/tests/unit_tests/services/test_account_service.py

 from services.errors.account import (
     AccountAlreadyInTenantError,
     AccountLoginError,
-    AccountNotFoundError,
     AccountPasswordError,
     AccountRegisterError,
     CurrentPasswordIncorrectError,
 
         # Execute test and verify exception
         self._assert_exception_raised(
-            AccountNotFoundError, AccountService.authenticate, "notfound@example.com", "password"
+            AccountPasswordError, AccountService.authenticate, "notfound@example.com", "password"
         )
 
     def test_authenticate_account_banned(self, mock_db_dependencies):

docker/.env.example

 
 # Reset password token valid time (minutes),
 RESET_PASSWORD_TOKEN_EXPIRY_MINUTES=5
+EMAIL_REGISTER_TOKEN_EXPIRY_MINUTES=5
 CHANGE_EMAIL_TOKEN_EXPIRY_MINUTES=5
 OWNER_TRANSFER_TOKEN_EXPIRY_MINUTES=5
 

docker/docker-compose.yaml

   INDEXING_MAX_SEGMENTATION_TOKENS_LENGTH: ${INDEXING_MAX_SEGMENTATION_TOKENS_LENGTH:-4000}
   INVITE_EXPIRY_HOURS: ${INVITE_EXPIRY_HOURS:-72}
   RESET_PASSWORD_TOKEN_EXPIRY_MINUTES: ${RESET_PASSWORD_TOKEN_EXPIRY_MINUTES:-5}
+  EMAIL_REGISTER_TOKEN_EXPIRY_MINUTES: ${EMAIL_REGISTER_TOKEN_EXPIRY_MINUTES:-5}
   CHANGE_EMAIL_TOKEN_EXPIRY_MINUTES: ${CHANGE_EMAIL_TOKEN_EXPIRY_MINUTES:-5}
   OWNER_TRANSFER_TOKEN_EXPIRY_MINUTES: ${OWNER_TRANSFER_TOKEN_EXPIRY_MINUTES:-5}
   CODE_EXECUTION_ENDPOINT: ${CODE_EXECUTION_ENDPOINT:-http://sandbox:8194}