Domain of Sender does not exist

[brad davison]

We are using Sendmail.
Sendmail version 8.13.8, config V10/Berkeley

It is just odd that of our 17 domains we send/receive mail for.. only the 4 
that are specified in our DNS are the ones having problems.

The Domains are all listed in local-domain file.

If there is something else i can check or put in my sendmail config, i'm all 
ears.  It is configured for SMTP AUTH so its the check_rcpt that is giving 
up the error.

>From: Derek Ragona <derek at computinginnovations.com>
>To: "brad davison" 
><demonichandextensions at hotmail.com>,freebsd-questions at freebsd.org
>Subject: Re: Domain of Sender does not exist
>Date: Wed, 12 Sep 2007 09:27:51 -0500
>
>At 08:58 AM 9/12/2007, brad davison wrote:
>>We have SMTP AUTH set up on our mail server.  Our mail server accepts mail 
>>for several domains.
>>x.com
>>y.com
>>z.com
>>
>>Outgoing messages from [user]@x.com, and [user]@y.com goes out fine, but 
>>emails going out from [user]@z.com are getting:
>>
>>Domain of Sender does not exist ([user]@z.com] 5.1.8
>>
>>The oddest thing, is that this server is the MTA for z.com.  Sending to 
>>[user]@z.com will end up on this box no problem.
>>
>>I did not set up our DNS, and it is in Active Directory.  In our DNS 
>>"z.com" in the Forward Lookup Zone has A record for the email server, and 
>>MX record for the email server.
>>
>>What could be hanging this up?  The x.com and y.com are not specified in 
>>our DNS locally at all, so I am not sure how to model the DNS for these 
>>domains.
>>
>>Also, when I 'paused' the z.com zone, I got the
>>Domain of Sender does not resolve 4.1.8 error.
>>
>>Any leads on where my DNS or configs might be not able to resolve this 
>>domain?
>
>What are you using to send mail?  If it is sendmail, sounds like a sendmail 
>error.
>
>         -Derek
>
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