Dennis Wallberg wrote:

>Strange question.. Dont think u can.
>  
>

Why strange?

Just imagine a hotel with guests trying to send mail - all of them using 
there 'home net ' smtp server which should result in a relay access denied.

Instead just redirect all smtp traffic to own provider = all guests 
happy = less support needs

Not strange - great service ;-D

-- 
Best regards

Morten Winther
System & Application Architect