how to change email username syntax

[bittermang]

We just migrated all of our web sites and 275 email accounts to a new server running cPanel. However, their previous server was using the syntax of "username.domain" for the username. cPanel supports "[email protected]", "username+domain", and "username%domain", but not with a dot.

The different options would suggest it could be changed. However I don't know where to begin. What config file controls the authentication syntax? We'd really like to solve this before we go live so we don't have to send our techs all across the county to reconfigure everyone's Outlook.

Thanks.

 

[bittermang]

Alright, how about if I say please?

 

[jandafields]

I don't think it can be done, since email addresses can have periods in them, there would be no way to know which period seperated the user from the domain