Thanks for the help guys. My configuration only has one IP bound on the exchange server, so unfortuantely that technote didn't apply but definitely went into the saved bin! I did indeed telnet to the multiple mx records to test if they were up or down. A majority of ours goes to Govt. Facilities, and so far seem to be valid alternates. I did however, find one queue article that addressed this issue, but the fix is supposed to be in the SMTP service through IIS. Basically apply SP3. I did this over the weekend on a customer site, and 3 of their retry queues did clear, but many others did not. Still working it. The Q article I found was: Q303889
> If a host answers and rejects the message, the message won't be rejected > to another server. For example, a customer of mine had three > ISP-managed MX recoreds, two of which pointed to a service provider that > no longer hosted its domain. Had its primary mail server died, sending > SMTP servers would try the bad alternates, which would bounce the > messages. Without the two bad alternate MX records, the sending SMTP > servers would retry for a while. > > Maybe what's happening in your case is that one of the two SMTP servers > is misconfigured or something. Try doing a telnet session to port 25 on > each to see if you can get any clues. > > Ed Crowley MCSE+I MVP > Technical Consultant > hp Services > "There are seldom good technological solutions to behavioral problems." > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]] On Behalf Of Kevin Cobb > Sent: Wednesday, October 02, 2002 1:07 PM > To: Exchange Discussions > Subject: RE: win2k sp2 smtp server error 5.0.0 > > > I seem to be having the same issue with Exchange not mailing some > domains, while mailing others just fine. (I also seen the same from > time to time > with Hotmail). What I've tracked down and believe to be happening is > when a primary mx record is not answering, our exchange 2000 server is > not attempting to mail to the secondary server. I'm seeing this on two > other > exchange 2000 servers as well. I fired up the older lotus notes server > and watched the logs as it attempted mailing to the "bad domain". The > logs show that the initial mx record was attempted and failed, but then > connected to the secondary and mail is transferred. Unfortuantely I > cannot find any logs of this nature in exchange to show the process, but > every domain in the "retry queue" with "Connection Dropped by the Remote > Host" has a primary MX record that is not responding. > > Anyone have any clues on what might be going on on the Exchange box > there? It's set up behind an ISA server. Has local and remote DNS > lookup. Can resolve NSLOOKUPs from the exchange server. It just > doesn't seem to want to attempt a secondary MX record if the primary > fails. > > Any ideas would be greatly appreciated, and would save hairs on my head! > > Kevin Cobb > Network Manager > (703) 449-7600 > > > Updated -=20 > > > > I think I might have found the problem: > > > > http://support.microsoft.com/default.aspx?scid=3Dkb;en-us;Q240832 > > > > but if I set it to use HELO, I don't get the option for it to use > > EHLO, so I would lose the ability to send out as ESMTP?? > > > > > > > > Rob Ellis=20 > > Network Manager=20 > > Profectus IT=20 > > Tel 023 9224 7960=20 > > Mob 07974 111867 > > > > > > -----Original Message----- > > From: Rob Ellis=20 > > Sent: 26 September 2002 15:37 > > To: Exchange Discussions > > Subject: win2k sp2 smtp server error 5.0.0 > > > > Using a Win2K sp2 box in our DMZ running the MS smtp server, as a > > relay for our E2K server. All incoming traffic flows fine, but we are > > > getting a number of NDRs such as: > > > > The e-mail system was unable to deliver the message, but did not > > report a specific reason. Check the address and try again. If it > > still fails, contact your system administrator. > > > > <mail.profectus.co.uk #5.0.0 smtp;500 Syntax error, command > > unrecognized> > > > > this is happening for a variety of domain names, including hotmail.com > > > (which I'm not that worried about, but some of the domains are > > actually 'proper' domains.) > > > > Could it be that the IP that our server sits on has been blacklisted > > by certain ISPs? > > > > > > > > Rob Ellis=20 > > Network Manager=20 > > Profectus IT=20 > > Tel 023 9224 7960=20 > > Mob 07974 111867 > > > > > > > > _________________________________________________________________ > > List posting FAQ: http://www.swinc.com/resource/exch_faq.htm > > Archives: http://www.swynk.com/sitesearch/search.asp > > To unsubscribe: mailto:[EMAIL PROTECTED] > > Exchange List admin: [EMAIL PROTECTED] > > _________________________________________________________________ > List posting FAQ: http://www.swinc.com/resource/exch_faq.htm > Archives: http://www.swynk.com/sitesearch/search.asp > To unsubscribe: mailto:[EMAIL PROTECTED] > Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED]
