Information:
vpopmail provides support for hosting virtual email
domains on mail servers running qmail. It easily
supports from 1 to over 100,000 domains. It also
supports from 1 to millions of email accounts per domain.
It automates and simplifies many of the tasks needed
to manage virtual domains . User authentication information
can be stored in hash files, mysql, oracle, sybase,
postgreSQL or LDAP. The programming API simplifies
writing addon software, such as qmailadmin, vqregister
and many other vpopmail compatible programs.
vpopmail has an active development and support
community and is running world wide in at least
80 different countries.