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There are multiple authentication mechanisms available to use with dovecot. These databases can be used as ALTERNATIVES to the System users (passwd) as both password databases and user databases:* Passwd-file: /etc/passwd-like file in specified location* LDAP: Lightweight Directory Access Protocol* SQL: SQL database (PostgreSQL, MySQL, SQLite)* Dict: Dict key-value database (Redis, memcached, etc.)* VPopMail: External software used to handle virtual domains The scope of configuration for each of this is too broad to cover in this page. Follow the links to the pages for each individual means if available.Example A: In this example we will configure postfix and dovecot for a system with a mix of unix and virtual user accounts. The example can be seen in [[Dovecot and Postfix Hybrid Authentication Example]].== Determine installed version ==From the command line: dovecot --version [[Category:Computer_Technology]][[Category:Linux]]