We are having problems sending email to a client that is using M$ Proxy Server (ISA) for screening email that is incoming to their Exchange Server. All emails from us to them fail delivery. Here is a log entry sample.
05:14 15:40 SMTP-(0000016F) processing C:\IMAIL\spool\Q682011a.SMD 05:14 15:40 SMTP-(0000016F) Trying lakelandgov.net (0) 05:14 15:40 SMTP-(0000016F) Connect lakelandgov.net [216.53.197.231:25] (1) 05:14 15:40 SMTP-(0000016F) 220 screener.col.lakelandgov.lcl Microsoft ESMTP MAIL Service, Version: 5.0.2195.4905 ready at Tue, 14 May 2002 15:36:19 -0400 05:14 15:40 SMTP-(0000016F) >EHLO dns.mgtamer.com 05:14 15:40 SMTP-(0000016F) rl-recv: (00002746) connection reset 05:14 15:40 SMTP-(0000016F) 05:14 15:40 SMTP-(0000016F) >HELO dns.mgtamer.com 05:14 15:40 SMTP-(0000016F) rl-recv: (00002746) connection reset 05:14 15:40 SMTP-(0000016F) 05:14 15:40 SMTP-(0000016F) SMTP_DELIV_FAILED 05:14 15:40 SMTP-(0000016F) >QUIT 05:14 15:40 SMTP-(0000016F) rl-recv: (00002746) connection reset 05:14 15:40 SMTP-(0000016F) 05:14 15:40 SMTP-(0000016F) requeuing C:\IMAIL\spool\Q682011a.SMP R0 T1 05:14 15:40 SMTP-(0000016F) finished C:\IMAIL\spool\Q682011a.SMP status=3 When speaking with the techs on their end, they said if they change the Proxy Server NOOP setting to a higher value, they can then receive our messages. Here is a sample log of that. 05:16 11:16 SMTP-(000001AC) processing C:\IMAIL\spool\Qcb0713e.SMP 05:16 11:16 SMTP-(000001AC) Trying lakelandgov.net (0) 05:16 11:16 SMTP-(000001AC) Connect lakelandgov.net [216.53.197.231:25] (1) 05:16 11:16 SMTP-(000001AC) 220 screener.col.lakelandgov.lcl Microsoft ESMTP MAIL Service, Version: 5.0.2195.4905 ready at Thu, 16 May 2002 11:16:03 -0400 05:16 11:16 SMTP-(000001AC) >EHLO dns.mgtamer.com 05:16 11:16 SMTP-(000001AC) 502 05:16 11:16 SMTP-(000001AC) >HELO dns.mgtamer.com 05:16 11:16 SMTP-(000001AC) 250 screener.col.lakelandgov.lcl Hello [199.44.118.253] 05:16 11:16 SMTP-(000001AC) >MAIL FROM:<[EMAIL PROTECTED]> 05:16 11:16 SMTP-(000001AC) 250 2.1.0 [EMAIL PROTECTED] OK 05:16 11:16 SMTP-(000001AC) >RCPT To:<[EMAIL PROTECTED]> 05:16 11:16 SMTP-(000001AC) 250 2.1.5 [EMAIL PROTECTED] 05:16 11:16 SMTP-(000001AC) >DATA 05:16 11:16 SMTP-(000001AC) 354 Start mail input; end with <CRLF>.<CRLF> 05:16 11:16 SMTP-(000001AC) >. 05:16 11:16 SMTP-(000001AC) 250 2.6.0 <002c01c1fceb$351cd280$4d00a8c0@Hank2> Queued mail for delivery 05:16 11:16 SMTP-(000001AC) rdeliver lakelandgov.net [EMAIL PROTECTED] (1) <[EMAIL PROTECTED]> 1607 05:16 11:16 SMTP-(000001AC) >QUIT 05:16 11:16 SMTP-(000001AC) 221 2.0.0 screener.col.lakelandgov.lcl Service closing transmission channel 05:16 11:16 SMTP-(000001AC) finished C:\IMAIL\spool\Qcb0713e.SMP status=1 Does anyone have any idea what is happening here and why? They claim that my Imail server is sending the NOOP command and that the have the length of the command set to 6. If they change it to 1024, they can receive my emails. The also claim that they are not rejecting emails from any other domains but I doubt if they know this for sure since they didn't even have logging turned on before I reported a problem. Any help would be greatly appreciated. Hank --- [This E-mail has been scanned for viruses.] [MGT of America, Inc.] Please visit http://www.ipswitch.com/support/mailing-lists.html to be removed from this list. An Archive of this list is available at: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Please visit the Knowledge Base for answers to frequently asked questions: http://www.ipswitch.com/support/IMail/
