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Re: SMTP domain not found errors 501 and 550
Ben Parker <[log in to unmask]>
Wed, 27 Sep 2000 21:52:54 -0600
text/plain (16 lines) 
On Wed, 27 Sep 2000 08:42:13 -0400, Lowell Davis <[log in to unmask]>
wrote:

>Our e-mail comes into our domain via one of two MX entries, neither of which is
>ddoc.adlt.com; thorium.adlt.com is the primary MX.
>
Well there's the problem.  You can't send mail into the outside world which
contains an invalid/non-existent RFC821 MAIL FROM:<address> for an unregisterd,
non-existent domain.  This is guaranteed to fail, and/or produce strange and
puzzling errors.  

>>Can I change the RFC821 MAIL FROM: address?

Yes, either choose an existing, valid fully qualified domain name or register
the FQDN you are using in DNS.

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