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From: Norbert Koch <n.koch@eai-delta.de>
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Subject: Re: sender domain must exist...
Date: 29 Oct 1999 07:56:36 +0200
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Prateek Sadhukhan <psadhukhan@hss.hns.com> writes:

> I am behind a firewall. my company domain is hss.hns.com, while my
> machine is psadhukhan.hss.hns.com. Its seems to me that when the
> receiver of the mail tries to authenticate the domain, it tries to
> find the domain psadhukhan.hss.hns.com which being behind the firewall 
> is not visible to it. But then this should be a problem with any mails 
> send from my box whether i use gnus or pine.

Hi.

It seems to me that neither user-mail-address nor mail-host-address is
set. The former defaults to "user@mail-host-address" and the latter
defaults to your hostname which might explain your problem. Thus, try
setting user-mail-address, either using customize-variable or

(setq user-mail-address "psadhukhan@hss.hns.com")

HTH, norbert.