diff --git a/src/app.py b/src/app.py
index 12b3c4233..579b6b21e 100644
--- a/src/app.py
+++ b/src/app.py
@@ -3267,7 +3267,7 @@ def regen_mail_app_user_config_for_dovecot_and_postfix(only=None):
         if dovecot:
             hashed_password = _hash_user_password(settings["mail_pwd"])
             dovecot_passwd.append(
-                f"{app}:{hashed_password}::::::allow_nets=::1,127.0.0.1/24,local"
+                f"{app}:{hashed_password}::::::allow_nets=::1,127.0.0.1/24,local,mail={mail_user}@{mail_domain}"
             )
         if postfix:
             mail_user = settings.get("mail_user", app)