Honestly, I don't know if there is a patch or not. But it's a known issue. Regards,
Michael B. Smith Consultant and Exchange MVP http://TheEssentialExchange.com -----Original Message----- From: Kurt Buff [mailto:kurt.b...@gmail.com] Sent: Friday, October 14, 2011 5:21 PM To: MS-Exchange Admin Issues Subject: Re: Exchange 2003 and perhaps erroneous name resolution Old problem - does that mean there's a fix? I had thought I was all patched up, but am very willing to believe I've missed something. Makes sense, though. Thanks for the input. Kurt On Fri, Oct 14, 2011 at 13:43, Michael B. Smith <mich...@smithcons.com> wrote: > Wow that's an old problem. > > Under certain conditions, when Exchange 2003 gets an NX for an MX request, > instead of aborting the email; it falls through and attempts to send it to > the IP address. > > FYI: the primary nameserver for that domain isn't responding (at least from > here). That's almost certainly related. > > Regards, > > Michael B. Smith > Consultant and Exchange MVP > http://TheEssentialExchange.com > > > -----Original Message----- > From: Kurt Buff [mailto:kurt.b...@gmail.com] > Sent: Friday, October 14, 2011 4:02 PM > To: MS-Exchange Admin Issues > Subject: Exchange 2003 and perhaps erroneous name resolution > > All, > > One of our staff tried to send an email to kenwood-electronics.co.uk. > I've got the SMTP logs, and it shows our Exchange server talking with > 193.93.175.84. > > Dig shows that that IP address is the A record for Kenwood in the UK, > and not any of the MX records - that firm uses maildefender.net. > > OTOH, there *is* a mail server at that IP address - mail3.iztzg.hr, > and of course it refused to relay for kenwood-electronics.co.uk. > > So, my question is, where should I look to start troubleshooting why > my Exchange server sometimes erroneously uses the A record when there > is a clear MX record available? > > Thanks, > > Kurt > > --- > To manage subscriptions click here: > http://lyris.sunbelt-software.com/read/my_forums/ > or send an email to listmana...@lyris.sunbeltsoftware.com > with the body: unsubscribe exchangelist > > --- > To manage subscriptions click here: > http://lyris.sunbelt-software.com/read/my_forums/ > or send an email to listmana...@lyris.sunbeltsoftware.com > with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist
