Persistent name service error

[Robert F. Kennedy]

Hello,

I am running a mail server using a static IP with Teksavvy. I am running the
following services on RH9: apache, mambo, dns, postfix and Mailman. The main
purpose of the server is to run web and email services for the non-profit
shambhalatoronto.org. Everything was working well until about two weeks ago
when Mailman email stopped going through. When I sent an email to the test
list "test-bavBZ82//owgFV0ZGDeh72D2FQJk+8+b at public.gmane.org" I got the following error:

Received: from c1m5.emaildefenseservice.com ([216.40.36.37])
        by smtp.pppoe.ca (Internet Mail Server v1.0) with SMTP id WGZ34924
        for <rfk-R6A+fiHC8nRWk0Htik3J/w at public.gmane.org>; Wed, 18 Jan 2006 00:59:24 -0500
Received: from barracuda.pppoe.ca [206.248.154.34] (EHLO barracuda.pppoe.ca)
	by c1m5.emaildefenseservice.com (mxl_mta-1.3.8-10p10) with ESMTP id
449ddc34.19801.176.c1m5;
	Wed, 18 Jan 2006 00:59:32 -0500 (EST)
Received: by barracuda.pppoe.ca (Spam Firewall)
	id C5B671182BF; Wed, 18 Jan 2006 00:59:18 -0500 (EST)
Date: Wed, 18 Jan 2006 00:59:18 -0500 (EST)
From: MAILER-DAEMON (Mail Delivery System)
Subject: Undelivered Mail Returned to Sender
To: rfk-R6A+fiHC8nRWk0Htik3J/w at public.gmane.org
MIME-Version: 1.0
Content-Type: multipart/report; report-type=delivery-status;
	boundary="AF38A117985.1137563958/barracuda.pppoe.ca"
Message-Id: <20060118055918.C5B671182BF-JE8hqn47KVKeKb84uUKZOLDks+cytr/Z at public.gmane.org>
X-Spam: exempt
X-MAIL-FROM: <>
X-SOURCE-IP: [206.248.154.34]

This is the Spam Firewall at barracuda.pppoe.ca.

I'm sorry to inform you that the message below could not be delivered.
When delivery was attempted, the following error was returned.


<test-bavBZ82//oz6cDPbkz/7+etnjj8NnB7F at public.gmane.org>: Name service error for
name=shambhalaotoronto.org
    type=A: Host not found

With generous help from the folks at Unix Unanimous, I could see that I'd
forgotten to put in my new IP address when I switched from Istop to Teksavvy
at Directnic where I purchased the domain. I updated this on Thursday,
January 12 and emails that had been sent a week before started to come
through and some emails newly posted went through. On January 13th things
were still working but after that nothing again and now emails sent to
test-bavBZ82//owgFV0ZGDeh72D2FQJk+8+b at public.gmane.org are coming back with the same error
"name=shambhalaotoronto.org type=A: Host not found".

Dnsreport.com says everything is fine except that it can't connect to my
mail server but I can telnet into mail.shambhalatoronto.org smtp just fine.

Any ideas would be greatly appreciated.

Thanks,
Robert
Toronto

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