[imp] Incorrect domain showing when no identity set

[Dan H]

>> I am having a problem with the wrong domain name showing in IMP when 
>> I click to
>> compse an email.  This is where the user hasn't gone in yet to define an
>> identity.  How can I make it so the compose will use the correct 
>> domain without
>> the user having to do anything?  I do have the realm option set in the imp
>> conf.php file.
>
> Use the 'maildomain' setting in config/servers.php

That is already set.  Is there anything else that might cause it?