Description:

This plugin allows you to use just one SquirrelMail installation to
host web mail for multiple domains. It is highly configurable, and
allows such things as:
- allow users to log in with just "jose" when in fact their IMAP login
might be something like "jose@domain.com"
- show a different image on the login page for each of your domains
- change most any SquirrelMail configuration setting on a per-domain
basis (or even per-user!)
- access a sendmail-style virtual users table
- change IMAP servers (or any other settings) on a per-domain (or even
on a per-user) basis
- enable or disable certain plugins on a per-domain basis
- dealiasing of Qmail/Vpopmail aliased domains
- domain name translation
- much more...

Note that if you only need some of these features, the others may be
turned off.