[BUGS] Sendmail as forwarder

[John Marshall]

Jerahmy Pocott wrote:
> 
> m9932kjas8392   5   1929378+ Jan 2 11:53 <user at external.domain>
> (Deferred: 450 4.1.8 <user at host.local.domain>: Sender address  
> rejected: Domain not found)

Your ISP's relay is rejecting your email because the domain of the email 
sender address is not registered in DNS.

The "masquerade" features in Sendmail re-write the sender address which, 
I think, is what you're wanting. I have never had the need to use those 
options myself.
<http://www.sendmail.org/doc/sendmail-current/cf/README>

-- 
John Marshall