Mailing List CGatePro@mail.stalker.com Message #95175
From: Martin.Hepworth <martinh@solidstatelogic.com>
Subject: RE: Mailing list warning messages
Date: Mon, 09 Jun 2008 15:32:14 +0100
To: CommuniGate Pro Discussions <CGatePro@mail.stalker.com>
X-Mailer: CommuniGate Pro MAPI Connector 1.51.15.1/1.51.16.4
Andy

I'd check with a 'local' on first which will normally cache stuff anyway. If it doesn't know it should go up the tree for an answer.

If you're running CGP on linux I'd be tempted to put in a local caching only dns server (eg bind with only a forward line to the AD DNS servers ) to make things a lot lot more simpler and quicker.


--
Martin Hepworth
Snr Systems Administrator
Solid State Logic
Tel: +44 (0)1865 842300

> -----Original Message-----
> From: CommuniGate Pro Discussions [mailto:CGatePro@mail.stalker.com] On
> Behalf Of Andy Kunkle
> Sent: 09 June 2008 15:26
> To: CommuniGate Pro Discussions
> Subject: Re: Mailing list warning messages
>
> Thanks for the reply.
>
> Currently my DNS Timeout is set to 25 seconds. I also have 15 concurrent
> requests and a retry limit of 5. Should I maybe move the concurrent
> requests up to 50 just to see how it goes?
>
> I have listed my ISP's DNS server, then my AD server's IP, and then my
> ISP's second DNS server and set the DNS Server Address to Custom. It
> doesn't seem like the mail server is moving to the next DNS Server if
> there's an error, or a delay. Isn't that how it's supposed to act?
>
> Andy Kunkle
> IT Manager
> AIM Engineering & Surveying, Inc.
> 5300 Lee Blvd
> Lehigh Acres, FL 33971
> 239-332-4569
>
>
> > -----Original Message-----
> > From: CommuniGate Pro Discussions [mailto:CGatePro@mail.stalker.com] On
> > Behalf Of John Keown
> > Sent: Monday, June 09, 2008 10:16 AM
> > To: CommuniGate Pro Discussions
> > Subject: Re: Mailing list warning messages
> >
> > No the issue appears to be with your dns servers. I have seen this with
> > in
> > the past when the dns server get overloaded with request and cannot
> > respond
> > in time. You may want to check you initial dns time out under the
> > obscure
> > settings. Increase the time out to maybe 7 seconds.
> >
> > I seem to remember someone in the past with the same issue and they had
> > a 1
> > second timeout.
> >
> > ----- Original Message -----
> > From: "Andy Kunkle" <akunkle@aimengr.com>
> > To: "CommuniGate Pro Discussions" <CGatePro@mail.stalker.com>
> > Sent: Monday, June 09, 2008 10:05 AM
> > Subject: Mailing list warning messages
> >
> >
> > Hey,
> >
> > I wanted to see if we could revisit this subject again. I'm still
> > having
> > annoying DNS Server Failed errors on my outbound mail queue. It seems
> > like
> > any messages containing more than a couple recipients get caught up in
> > the
> > Queue for no apparent reason. This happens the most with our mailing
> > lists.
> >
> > I'm getting strange DNS failures but then when I go into the Monitors /
> > Mail
> > and click on the messages and release the queue it sends. This is
> > obviously
> > very annoying to the mailing list recipients as they continually get
> > WARNING
> > messages for no reason.
> >
> > 09:52:24.269 3 DNR-025994(wfla.com) MX:DNS server failure
> > 09:52:24.269 3 DNR-025995(bradentonherald.com) MX:DNS server failure
> > 09:52:24.269 3 DNR-025991(yourobserver.com) MX:DNS server failure
> >
> > But if I go and do a nslookup for those domains' MX records, they
> > resolve
> > just fine. If I do nothing I've seen messages sit in the Queue for 3
> > days
> > without being sent. Is there some setting in the bowels of the CGPro
> > Administrative interface that might be holding these messages up?
> >
> > Help??
> >
> > Andy Kunkle
> > IT Manager
> > AIM Engineering & Surveying, Inc.
> > 5300 Lee Blvd
> > Lehigh Acres, FL 33971
> > 239-332-4569
> >
> >
> >
> >
> > Andy Kunkle
> > IT Manager
> > AIM Engineering & Surveying, Inc.
> > 5300 Lee Blvd
> > Lehigh Acres, FL 33971
> > 239-332-4569
> >
> > From: CommuniGate Pro Discussions [mailto:CGatePro@mail.stalker.com] On
> > Behalf Of Andy Kunkle
> > Sent: Tuesday, April 29, 2008 2:32 PM
> > To: CommuniGate Pro Discussions
> > Subject: Re: Mailing list warning messages
> >
> > Good suggestion! I'll give that a try. I'd been using my AD server but
> > things seem to get a little bound up at times on that due to heavy
> > loads...
> > that's why I changed over to the ISP servers.
> >
> > Thanks!
> >
> > Andy Kunkle
> > IT Manager
> > AIM Engineering & Surveying, Inc.
> > 5300 Lee Blvd
> > Lehigh Acres, FL 33971
> > 239-332-4569
> >
> > From: CommuniGate Pro Discussions [mailto:CGatePro@mail.stalker.com] On
> > Behalf Of Lyle Giese
> > Sent: Tuesday, April 29, 2008 12:52 PM
> > To: CommuniGate Pro Discussions
> > Subject: Re: Mailing list warning messages
> >
> > I have bonded T1's here also. But I run my own DNS servers and don't
> > rely on
> > a upstream ISP for dns. Another possiblity could also be overloaded DNS
> > servers at your ISP and you have no control over that. It's not hard to
> > setup recursive dns service on a *nix box to bypass your upstream
> > providers
> > servers and provide yourself with another layer of redundancy and
> > caching.
> >
> > Lyle
> >
> > Andy Kunkle wrote:
> > That could be. I have a 3 meg pipe to the Internet though. The only
> > error
> > messages I'm seeing are:
> >
> > 11:21:12.032 3 DNR-001084(netzero.net) MX:DNS server failure
> > 11:19:18.030 3 DNR-001003(wfla.com) A:DNS server failure
> >
> > But there's no reason associated with it. Just that it failed.
> >
> > Some info about my network: I am multi-homed and I have set things up
> > so all
> > DNS requests from my network go out my bonded T1's. So I'm using that
> > ISP's
> > DNS servers primarily.
> >
> > Thanks for the help!
> >
> > Andy Kunkle
> > IT Manager
> > AIM Engineering & Surveying, Inc.
> > 5300 Lee Blvd
> > Lehigh Acres, FL 33971
> > 239-332-4569
> >
> >
> >
> > -----Original Message-----
> > From: CommuniGate Pro Discussions [mailto:CGatePro@mail.stalker.com] On
> > Behalf Of Lyle Giese
> > Sent: Tuesday, April 29, 2008 10:10 AM
> > To: CommuniGate Pro Discussions
> > Subject: Re: Mailing list warning messages
> >
> > Have you looked at congestion on your Internet connection? It's
> > possible
> > that you are flooding(too many simultaneous outgoing SMTP channels??)
> > your connection and the UDP packets from the resolver are getting lost.
> > Are you getting DNS error messages in CGPro's logs when the list is
> > sending out?
> >
> > Lyle
> >
> > Andy Kunkle wrote:
> >
> > I constantly get warning messages that stack up in my queue from our
> >
> > PR guy's mailing lists he sends to. It seems like every e-mail he has
> > in the list gets a DNS failure at first and generates this bounce
> > message:
> >
> > This is an automated message from the mailing list...
> >
> > List messages sent to your address <e-mail > have bounced.
> >
> > If you read this message, your mail system has been probably fixed.
> >
> > To clear the bounce counter and to prevent automatic cancellation of
> > your subscription, use the Reply command in your mailer.
> >
> > Check that the Subject of the reply message contains
> > the confirmation ID: 0621242263,
> > and the reply is directed to <list@domain.com>,
> > and the 'From' address of your reply is <email>.
> >
> > All requests about this mailing list
> > should be sent to <list@domain.com>
> >
> > But when I do an nslookup on the domain the person is from, it
> >
> > resolves fine. And generally if I go into the queue and click Release
> > Now, it sends the message fine. The problem reported is DNS server
> > Failure. It's getting pretty annoying. Is there a setting I'm missing
> > that either will help the bounces stop happening (this particular e-
> > mail address was a hotmail.com address) or not send a warning after
> > just one delay or DNS failure? I've tried all sorts of DNS servers,
> > including 4.2.2.2 but these failures continue.
> >
> > Thanks for the help!
> >
> > Andy Kunkle
> > IT Manager
> > AIM Engineering & Surveying, Inc.
> > 5300 Lee Blvd
> > Lehigh Acres, FL 33971
> > 239-332-4569
> >
> >
> >
> >
> >
> >
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