Date:  Mon, 17 Jul 2006 06:57:44 -0500
From:  "Gerald Waugh" <gwaugh (at mark) frontstreetnetworks.com>
Subject:  [coba-e:06037] Re: Unable to send email
To:  <coba-e (at mark) bluequartz.org>
Message-Id:  <039c01c6a998$371cdf40$0301a8c0@Jerrycp>
In-Reply-To:  <fc.000f814700239e443b9aca004aaad265.239e48 (at mark) fc.zio.com>
X-Mail-Count: 06037

> 
> I have seen this error before. It was diagnosed as a DNS 
> settings error where the server was unable to retrieve an 
> acceptable name. The fix was to turn on BlueQuartz DNS and 
> put 127.0.0.1 back in as the primary DNS source.

You need a working nameserver here, not 127.0.0.1
Probably using the IP address of the server itself would sork better.
Test by running 'dig' in a shell session
  "dig yahoo.com"
See if you get an answer.
 
> Jul 16 07:57:13 blue in.qpopper[16500]: (v4.0.5) Unable to 
> get canonical name of client

The above indicates that the server failed on gethostbyaddr()

Gerald