[ExchangeList] Re: send connector issue

  • From: "Tom Kern" <tpkern@xxxxxxxxx>
  • To: exchangelist@xxxxxxxxxxxxx
  • Date: Thu, 17 Jan 2008 10:57:40 -0500

http://www.msexchange.org
-------------------------------------------------------this is what i see in 
the netmon cap-

DNS: 0x6A13: Std Qry for MYSMARTHOST.DOMAIN.COM. of type Mail Xchg on
class INET addr



On Jan 17, 2008 10:36 AM, Tom Kern <tpkern@xxxxxxxxx> wrote:
> But in netmon i see a dns query for the mx record of the smarthost
> fqdn and then a "server failure" error is the response from dns....
> its the only dns query I see inrealtion to the smarthost
>
> this connector has 3 HT source servers, all with the same "issue".
>
> thats all i see.
> it never gets to smtp.
>
> thanks
>
>
> On Jan 17, 2008 10:22 AM, Michael B. Smith
>
> <michael@xxxxxxxxxxxxxxxxxxxxxxxx> wrote:
> > http://www.msexchange.org
> > -------------------------------------------------------Smarthost MX 
> > records, if they exist, are ignored.
> >
> > Regards,
> >
> > Michael B. Smith
> > MCSE/Exchange MVP
> > http://TheEssentialExchange.com
> >
> >
> > -----Original Message-----
> > From: exchangelist-bounce@xxxxxxxxxxxxx
> > [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Tom Kern
> > Sent: Thursday, January 17, 2008 10:11 AM
> > To: exchangelist@xxxxxxxxxxxxx
> > Subject: [ExchangeList] Re: send connector issue
> >
> > http://www.msexchange.org
> >
> > -------------------------------------------------------No.
> > i'm using the internal settings
> > dns is working fine
> > there is an A record for the smarthost and that can be resolved just fine.
> >
> > I've used fqdn rarely in ex2k3 and can't remeber if they had mx
> > records but it seems to me it goes against the concept of a smarthost
> > for exchange to expect an mx record but what do i know?
> >
> > Just wondering if anyone elsecan confirm that ex2k7 send connectors
> > try to lookup mx records when using a fqdn for a smarthost and that
> > this is a requirement.
> >
> > thanks alot
> >
> > On Jan 17, 2008 9:57 AM, James Chong <jchong@xxxxxxxxxxxx> wrote:
> > > http://www.msexchange.org
> > > -------------------------------------------------------Hmmm I think I've
> > always used the smarthost IP rather than IP. Can't
> > > seem to find any doc on smarthost resolution. By chance you're not doing
> > > external DNS resolution ie. Use the external DNS lookup settings and
> > > pointing to external manually configured DNS servers?
> > >
> > >
> > > James Chong
> > > Sr. Systems Engineer
> > > Simplexity, LLC.
> > > 11130 Sunrise Valley Drive, Suite 300
> > > Reston, VA 20191
> > > O (703) 657-4612
> > > C (703) 863-1483
> > >
> > >
> > > -----Original Message-----
> > > From: exchangelist-bounce@xxxxxxxxxxxxx
> > > [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Tom Kern
> > > Sent: Thursday, January 17, 2008 9:00 AM
> > > To: exchangelist@xxxxxxxxxxxxx
> > > Subject: [ExchangeList] Re: send connector issue
> > >
> > > http://www.msexchange.org
> > >
> > > -------------------------------------------------------Here is what I
> > > see-
> > >
> > > I ran Netmon
> > > the reason its failing is because the send connector is querying for
> > > an MX record for the FQDN of the smarthost BUT my smarthost doesnt
> > > have an MX record.
> > >
> > > Kinda defeats one of the points of using a smarthost
> > >
> > > why would it query for the mx record of a smarthost?
> > >
> > > if that is true, i would call that a bug....
> > >
> > > On Jan 17, 2008 8:39 AM, James Chong <jchong@xxxxxxxxxxxx> wrote:
> > > > http://www.msexchange.org
> > > > -------------------------------------------------------Does running
> > > the mail flow troubleshooter give any more details?
> > > >
> > > > Is this a new connector or an existing one that broke?
> > > >
> > > >
> > > >
> > > >
> > > > James Chong
> > > > Sr. Systems Engineer
> > > > Simplexity, LLC.
> > > > 11130 Sunrise Valley Drive, Suite 300
> > > > Reston, VA 20191
> > > > O (703) 657-4612
> > > > C (703) 863-1483
> > > >
> > > >
> > > > -----Original Message-----
> > > > From: exchangelist-bounce@xxxxxxxxxxxxx
> > > > [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Tom Kern
> > > > Sent: Thursday, January 17, 2008 12:42 AM
> > > > To: ExchangeList
> > > > Subject: [ExchangeList] send connector issue
> > > >
> > > > http://www.msexchange.org
> > > > -------------------------------------------------------Using a
> > > exchange
> > > > 2k7sp1 Send connector to forward email to a smarthost.
> > > > i have entered the FQDN of the smarthost in the connector.
> > > >
> > > > when i send email i get a "451 4.4.0 DNS query failed" in the queue
> > > > but I can telnet on port 25 from the hub transport to that smarthost
> > > > using the fqdn and nslookup from the HT resolves correctly as well.
> > > >
> > > > No auth is being used.
> > > >
> > > >
> > > >
> > > > any ideas?
> > > >
> > > >
> > > > thanks guys
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