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From: "Troy Cobb" <troy@solve.com>
Organization: Solutions Consulting
To: sreid@edmbbs.iceonline.com, isp@FreeBSD.ORG
Date: Tue, 5 Mar 1996 08:45:46 -700
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Subject: Re: named/sendmail problem: "MX points back..."
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> 
> This is not a FreeBSD-specific question, but other than that I think I
> have the right mailing list...
> 
> I'm trying to configure DNS for our site, which will soon be connected
> to the internet. I have named.hosts set up so that access to edmnet.com
> connects to kirk.edmnet.com. I've set this up as shown in RFC-1912, with
> the two 'A' records pointing to the same IP address. I also have
> kirk.edmnet.com set up as primary MX for the domain.
> 
> The problem is, when I try to send mail to user@edmnet.com, sendmail
> complains that "MX record for edmnet.com. points back to kirk.edmnet.com"
> and the mail bounces.
> 
> I don't know if this is a problem with DNS or sendmail. I can't see
> anything wrong with the named.hosts file, and the sendmail.cf file is
> the default that comes with FreeBSD. RFC-1912 mentions a "Cw" flag for
> sendmail, but I can't find enough documentation on this option to
> determine exactly what it does, and if/how it can fix the problem.
> 
> This is a fairly basic setup, but I can't find any info on this
> problem... I'd appreciate any help I can get.

The ORA "Bat" Book (Sendmail) should help you there.

[in clearer speak, get: 
sendmail
O'Reilly & Associates, Inc - publisher]

- Troy