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The classic "mail loops back" problem

daemon@ATHENA.MIT.EDU (Chris Powell)
Wed Oct 23 20:15:14 1996

To: redhat-list@redhat.com
Date: Wed, 23 Oct 1996 20:10:40 -0400
From: Chris Powell <helios@brickandivy.com>
Resent-From: redhat-list@redhat.com
Reply-To: redhat-list@redhat.com

I'm attempting to address the very popular "mail loops back to me" problem 
with sendmail, but I'm getting nowhere.  I can send out just fine, of 
course, but am unsuccessful at mailing from local machine to local machine.

There are lots of solutions on Deja News, but none seem to help me.  Can 
anyone tell me where I'm going wrong?

Here's some background info.

* 2 machines, pentagram and hexagram.  Pentagram is the internet gateway and 
nameserver on a permanent PPP connection.
* When sending mail on hexagram to "helios@pentagram" I get the standard 
"mail loops back to me" error message.
* pentagram's sendmail.cw:

 hexagram.brickandivy.com

* pentagram's appropriate parts of sendmail.cf:

 Cwlocalhost
 Cwbrickandivy.com
 Cwpentagram.brickandivy.com
 Cwpentagram

 DH
 DM

* hexagram's sendmail.cw is empty
* hexagram's sendmail.cf parts:

 Cwlocalhost
 Cwbrickandivy.com
 Cwhexagram.brickandivy.com
 Cwhexagram

 DS
 DR

 DHbrickandivy.com
 DMbrickandivy.com

* and finally, pentagram's nameserver data:

 pentagram               A               207.2.232.17
                        MX              10 pentagram
                        HINFO           "Pentium" "UNIX"

 hexagram                A               207.2.232.18
                        MX              10 pentagram
                        HINFO           "Pentium Pro" "UNIX"

Whew!  Anyway, I'm pretty certain there's a straightforward way to solve 
this, but I can't seem to find it.  (BTW, I did RTFM on page 56, but that 
didn't help.)

Regards,
Chris Powell

-- 
Christopher Powell         Brick and Ivy Corporate Consulting, Inc.
powell@brickandivy.com                   http://www.brickandivy.com
            -= A PGP key is available and gladly shared =-
                -= Please note my new email address =-



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