Sending Mail Problem

[hardip]

When I send any mail to an address outside our network, I get the error Domain of Sender address usr@localdomain.com does not exsist. Is there anything wrong with my smtpd.cfg ?

Pls help

[ScalixSupport]

There is nothing wrong with smtpd.cfg as this is not used for sending mail.

The problem exists in either your DNS or the recipients DNS ( you don't show the non-delivery ) which means that the sending address you are using cannot be resolved.

Cheers

Dave

[hardip]

Dear Dave, thanks for your reply. Unfortunately I am a newbie to linux, where would I check this ??