[SM-USERS] mail is sending from@example.com

[sploosh <st...@sp...>]

Hi,
Recently installed Squirrelmail, and all my Users that post from the web 
using s/mail are being received as us...@ex..., rather than having 
the associated domainname following the @

Anyone know what or how to configure it so that the user has 
us...@do...?  eg: us...@sp...

Thanks.