For example useful with userdb passwd for overriding e. In particular, it will fail if used directly as a userdb as the field used for home is not in the same place as expected by the Dovecot parser. The user database lookup can return these fields: Return success, don’t continue to the next userdb. This documentation is for Dovecot v2. If those mechanisms are used, the username is changed to be “user realm”. Continue to the next userdb without changing the user existence state.

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Empty lines and lines beginning with ‘ ‘ character are ignored. Dovecot supports VPopMail directly. That will only make your Dovecot installation less secure. IMAP and POP3 protocols currently have no concept of “domain”, so the username is just something that shows up in your logs and maybe in some configuration, but they have no direct functionality.

User Databases After a user tsatic been successfully authenticated, Dovecot looks up the user’s userdb information. Return “user doesn’t exist”, don’t continue to the doovecot userdb.


The databases usually contain the following information: For a user database, you need to set also uid, gid and preferably also home see VirtualUsers. This dovwcot can be used as a passdb: UserDatabase last edited Password and user databases Dovecot supports many different password databases and user databases.

User Databases

So don’t put dovecot into the mail group, and don’t make mails owned by the dovecot user. Existing virtual user management software VPopMail: If you leave any of the standard userdb fields uid, gid, home empty, these defaults will be used. Each one uses different args.

Skip if an earlier userdb already found the user notfound: If those mechanisms are used, the username is stafic to be “user realm”. Although not required, it’s highly recommended even for virtual users.

UserDatabase/Prefetch – Dovecot Wiki

Userdb fields and extra fields that are used, unless overwritten by the userdb backend. See UserIds gids for more information.

Skip if previous userdbs haven’t yet found the user And finally we can control what happens when we’re finished with this userdb v2. The userdb backend name args: However some authentication mechanisms do have an explicit support for realms pretty much the same as domains. The format of this value depends on the userdb driver.


Static User Database

The user database lookup can return these fields: This is available only for passdb. Changes the username can also be done by the passdb lookup Overwriting all mail-related settings, for example: The result values that can be used: Dict key-value database Redis, memcached, etc.

Currently supported user databases are: You can also have multiple databases. Virtual Userfb There are many ways to configure Dovecot to use virtual users.

Usually you shouldn’t need this. This documentation is for Dovecot v2. If any of the userdbs had an internal failure and the final userdb also returns “continue”, the lookup will fail with “internal error”.