Vmailmgr provides a virtualizing password-checking
interface to qmail-pop3d, a delivery agent to
automatically deliver mail within a virtual
domain, and a set of tools to manage such a
domain. It also has Courier IMAP support. It uses
one uid per domain, and this user can fully
administer the domain without needing suid access
rights. Making it work is as easy as adding a line
in qmail's virtualdomains file, and running a few
commands.
