Server Name in "Create Message"

I am using Sqwebmail v. 1.14.2.1 on a x86 machine running Linux 7.3. My
server name is literally "server.avi8r.com"

I am running sqwebmail in tandem with the complete courier package: smtp,
imap, pop3......et al.   I use this one server with a single installation of
courier/sqwebmail for several different domains, without problem.

The aggravation is that when a user accesses "Create Message" in the
sqwebmail web interface, the FROM: box always contains the username followed
by the server name, as such:

FROM:  "beau"<[email protected]>

The confusion to users from the different domains is obvious. What can I do
to either a.) delete everything beyond "beau"  or  b.) have the correct
domain name displayed and not he server's name?

Thanks in advance for your help. By the way, I have been following this
mail/group for some time and am amazed by the quantity and variety of
questions that you gentlemen solve.

Thanks.

- Wayne -