[webmin-l] Cannot change outgoing mail address on users

[GX <gx...@1b...>]

Hello All,

I am using Webmin/Virtualmin/Usermin on my mail server. I use 
Sendmail/MailScanner/SpamAssassin.

I am trying to get some of my virtual host's mail to tag their 
outgoing mail with their virtual host's domain to no avail.

I've tried setting them up under Sendmail under 'Ougoing Addresses' 
and 'Outgoing Domains'. I am also testing with my own personal 
account in Usermin and am unable to save the change of my own valid 
account name with valid virtual host domain under 'Complex' - 'Mail 
Forwarding' under Usermin.

Can someone please assist?

I have tried Googling and playing with this quite a bit the last week.

Thank You!
Glenn