[Dovecot] Usernames and Passwords for Virtual Users Request

[Matt]

A feature I think would be nice.

When a single IP hosts email for multiple domains the solution is usually to 
use the complete email address as the username.  I have users that have 
migrated from Cobalt RAQ's which do not work like that.

If a user trys to authenticate with just there username such as "joeb" 
instead of joeb at dirt.com I would like Dovecot to check all the domains it 
hosts and if it only finds one with the username "joeb" assume thats the 
one.  If multiple domains have the username "joeb" refuse to authenticate 
without the "@domain" part.

Perhaps this is not possible.  Sure would be handy though.  Oh, it would 
also be nice to automatically lowercase all usernames before authentication.

Matt