troubleshooting Question

Exchanges stopped sending SMTP data

Avatar of albevier
albevier asked on
ExchangeEmail Protocols
7 Comments1 Solution454 ViewsLast Modified:
Environment:
Exchange 2003 with latest SP and patches
W2K3 Server Standard
PIX 501 Firewall

Symptoms:
No outgoing email makes it to destination

Background:
- Server has been up and running for at least two years so I believe that the PIX SMTP issue is not the cause of the problem
- About six weeks ago all traffic to hotmail stopped. All other traffic continued without interruption
- Followed all troubleshooting ideas from here and Microsoft -  SPF and Reverse DNS verification, regeister with MS Secure ID, verify that we were not listed on any RBLs
- No changes were made to the server configuration
- Moved problem to MS Support and they verified that my server was logging into their's but felt that our server was not transmitting data
- Telneted into my personal (non-hotmail) account and sent data without a problem
- Telneted into hotmail and got 250 return codes when expected but still no email went through to hotmail
- Worked with MS support to the point that they indicated that they needed to adjust their filters to accomodate either our IP or our domain name (they were not specific about what their filters were looking at)
- Several days later NO email is going out to ANY domain so something outside of MS Hotmail is going on.
- Still receive incoming email

Below an SMTP log from a single email sent to two domains - hotmail and mydomain (Date, Time and other column have been removed to make it cleaner.) Everything looks good but no email was received and either domain.

QUESTION: is there a way from the logs to verify that data was actually transmitted?

65.54.244.136 Response - 25 - - 220+bay0-mc5-f18.bay0.hotmail.com+Sending+unsolicited+commercial+or+bulk+e-mail+to+Microsoft's+computer+network+is+prohibited.+Other+restrictions+are+found+at+http://privacy.msn.com/Anti-spam/.+Violations+will+result+in+use+of+equipment+located+in+California+and+other+states.+Mon,+26+May+2008+08:37:16+-0700+ 0 0 309 0 203 SMTP
 65.54.244.136 Command - 25 HELO - mail.mydomain.com 0 0 4 0 203 SMTP
 65.54.244.136 Response - 25 - - 250+bay0-mc5-f18.bay0.hotmail.com+(3.5.0.22)+Hello+[75.100.100.59] 0 0 66 0 296 SMTP
 65.54.244.136 Command - 25 MAIL - FROM:<admin@mydomain.com> 0 0 4 0 296 SMTP
 208.00.000.00 Response - 25 - - 220+spamfilter-21.isp.com 0 0 26 0 203 SMTP
 208.00.000.00 Command - 25 HELO - mail.mydomain.com 0 0 4 0 203 SMTP
 65.54.244.136 Response - 25 - - 250+admin@mydomain.com....Sender+OK 0 0 46 0 421 SMTP
 65.54.244.136 Command - 25 RCPT - TO:<randomtestacct@hotmail.com> 0 0 4 0 421 SMTP
 65.54.244.136 Response - 25 - - 250+randomtestacct@hotmail.com+ 0 0 31 0 531 SMTP
 65.54.244.136 Command - 25 RCPT - TO:<user@hotmail.com> 0 0 4 0 531 SMTP
 65.54.244.136 Response - 25 - - 250+user@hotmail.com+ 0 0 25 0 656 SMTP
 65.54.244.136 Command - 25 DATA - - 0 0 4 0 656 SMTP
 65.54.244.136 Response - 25 - - 354+Please+start+mail+input. 0 0 28 0 656 SMTP
 65.54.244.136 Response - 25 - - 250+Mail+queued+for+delivery. 0 0 29 0 656 SMTP
 65.54.244.136 Command - 25 QUIT - - 0 0 4 0 656 SMTP

This has got to be resolved asap.

Thanks in advance for your help.



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