This is Gentoo's testing wiki. It is a non-operational environment and its textual content is outdated.
Please visit our production wiki at https://wiki.gentoo.org
Translations:Complete Virtual Mail Server/Admin Support Systems/5/en
From Gentoo Wiki (test)
One of the core components of the setup is PostgreSQL. Make sure to read through and follow the wiki article to set up the PostgreSQL infrastructure before continuing. Alternatively there is also MySQL or LDAP.