RE: [IMail Forum] Sender domain must exist error

[Andrews, Bryan (CCI-Atlanta)]

I posted this earlier but would like to hear what others think of this... 

We had the same problems until we set up a c-name record to point to just
ourdomain.com. We had mx pointing properly to mail.ourdomain.com.
mail.ourdomain.com resolved properly from the ip (reverse) and
www.ourdomain.com resolved to our webserver. But we were having problems
with aol, digex, and bellsouth.net until we set up a record to point to just
ourdomain.com.

Once we did that it worked fine (even with a BS ip). I just looked up
ccm.edu and there is no record. I'd be willing to bet if you made a dns
record for it your mail problems would stop (hopefully).

It has something to do with spam protection on their end... let me know.

_______________________________

Bryan Andrews
Site Administrator - CCI Web
404.843.7408
404.847.6335 fax
404.597.2316 cel

Cox Communications, Inc.
1400 Lake Hearn Drive
Atlanta, GA 30319
mailto:[EMAIL PROTECTED]
_______________________________

 -----Original Message-----
From:   Tom Gillon [mailto:[EMAIL PROTECTED]] 
Sent:   Monday, August 23, 1999 12:12 PM
To:     [EMAIL PROTECTED]
Subject:        [IMail Forum] Sender domain must exist error

Hi folks,

I recently made my IMail server a gateway for my ccMail Link to SMTP
gateway,
and every once in a while, we are getting the following errors when trying
to
send e-mail out:

501 <[EMAIL PROTECTED]>... Sender domain must exist
ERR undeliverable 501 <[EMAIL PROTECTED]>... Sender domain must exist
SMTP_DELIV_FAILED
>QUIT

We know the addresses we are sending to are valid.  There doesn't seem to be
a
pattern as to which messages get this error.  I'd say about 99% of our
messages
are going through the IMail server.  Any help would be appreciated.  Thanks.

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