Mailing List CGatePro@mail.stalker.com Message #95180
From: Andy Kunkle <akunkle@aimengr.com>
Subject: RE: Mailing list warning messages
Date: Mon, 09 Jun 2008 13:19:58 -0400
To: CommuniGate Pro Discussions <CGatePro@mail.stalker.com>
X-Mailer: CommuniGate Pro MAPI Connector 1.51.15.1/1.51.16.4
> 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.

I was doing that first, but was still getting strange DNS errors. That's why I changed from my local one to begin with.

 
> 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.

Thanks for the suggestion here! I'll look into setting that up. Yes, I'm running it on Linux.

Andy



>
> --
> 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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