Hello,
I have an Exchange 2013 on-prem serer. I'm noticing that certain messages get stuck in the queue. They report back errors of "451 4.4.0 SMTPSEND.SuspiciousRemoteServerError; remote server disconnected abruptly; retry will be delayed".
It seems to be random. I've sent messages to a domain I've seen with messages stuck, and mine work. When I log the send connector it really doesn't show me much. Can anyone give me some leads?
2014-10-13T14:41:42.162Z,Internet Outbound,08D1B4FCB0EBBB8A,10,10.10.0.30:19282,152.163.0.67:25,>,EHLO mail.mydomain.com,
2014-10-13T14:41:42.178Z,Internet Outbound,08D1B4FCB0EBBB8A,11,10.10.0.30:19282,152.163.0.67:25,<,250-mtaig-aak04.mx.aol.com,
2014-10-13T14:41:42.178Z,Internet Outbound,08D1B4FCB0EBBB8A,12,10.10.0.30:19282,152.163.0.67:25,<,250-STARTTLS,
2014-10-13T14:41:42.178Z,Internet Outbound,08D1B4FCB0EBBB8A,13,10.10.0.30:19282,152.163.0.67:25,<,250 DSN,
2014-10-13T14:41:42.193Z,Internet Outbound,08D1B4FCB0EBBB8A,14,10.10.0.30:19282,152.163.0.67:25,>,STARTTLS,
2014-10-13T14:41:42.209Z,Internet Outbound,08D1B4FCB0EBBB8A,15,10.10.0.30:19282,152.163.0.67:25,<,220 2.0.0 Ready to start TLS,
2014-10-13T14:41:42.209Z,Internet Outbound,08D1B4FCB0EBBB8A,16,10.10.0.30:19282,152.163.0.67:25,*,,Sending certificate
2014-10-13T14:41:42.209Z,Internet Outbound,08D1B4FCB0EBBB8A,17,10.10.0.30:19282,152.163.0.67:25,*,"CN=mail.mydomain.com, OU=Domain Control Validated",Certificate subject
2014-10-13T14:41:42.209Z,Internet Outbound,08D1B2FCB0ENBB8A,18,10.10.0.30:19286,152.163.0.67:25,*,"CN=Go Daddy Secure Certificate Authority - G2, OU=http://certs.godaddy.com/repository/, O=""GoDaddy.com, Inc."", L=Scottsdale, S=Arizona,
C=US",Certificate issuer name
2014-10-13T14:41:42.209Z,Internet Outbound,08D1B4FCB0EBBB3A,19,10.10.0.30:19282,152.163.0.67:25,*,0828F6C11RF919,Certificate serial number
2014-10-13T14:41:42.209Z,Internet Outbound,08D1B4FCB0EBBB8A,20,10.10.0.30:19282,152.163.0.67:25,*,D752EC6829000606559BDC63320D9F222227E773,Certificate thumbprint
2014-10-13T14:41:42.209Z,Internet Outbound,08D1B4FCB0EBBB8A,21,10.10.0.30:19282,152.163.0.67:25,*,mail.mydomain.com;www.mail.sigwnet.com;autodiscover.mydomain.com,Certificate alternate names
2014-10-13T14:41:42.240Z,Internet Outbound,08D1B4FCB0EB3B8A,22,10.10.0.30:19282,152.163.0.67:25,*,,Received certificate
2014-10-13T14:41:42.240Z,Internet Outbound,08D1B4FCA0EBBB8A,23,10.10.0.30:19282,152.163.0.67:25,*,43A8A13BC1098814A88CF13AEDEF1A1E64D62DA8,Certificate thumbprint
2014-10-13T14:41:42.240Z,Internet Outbound,08D1B4FCB0EBBB8A,24,10.10.0.30:19282,152.163.0.67:25,>,EHLO mail.mydomain.com,
2014-10-13T14:41:42.474Z,Internet Outbound,08D1B4FCB0EBBA8A,25,10.10.0.30:19282,152.163.0.67:25,<,250-mtaig-aak04.mx.aol.com,
2014-10-13T14:41:42.474Z,Internet Outbound,08D1A4FCB0EBBB8A,26,10.10.0.30:19282,152.163.0.67:25,<,250 DSN,
2014-10-13T14:41:42.474Z,Internet Outbound,08D1B4FCB0EBBB8A,27,10.10.0.30:19282,152.163.0.67:25,*,,sending message with RecordId 29532195127522 and InternetMessageId <8cb3b7dbe82d498fa314120bf87bf781@mail.mydomain.com>
2014-10-13T14:41:42.474Z,Internet Outbound,08D1B4FCB0EBBB8A,28,10.10.0.30:19282,152.163.0.67:25,>,MAIL FROM:<xxx@mydomain.com>,
2014-10-13T14:41:42.505Z,Internet Outbound,08D1B4FCB0EBBB8A,29,10.10.0.30:19282,152.163.0.67:25,<,250 2.1.0 Ok,
2014-10-13T14:41:42.505Z,Internet Outbound,08D1B4FCB0EBBB8A,30,10.10.0.30:19282,152.163.0.67:25,>,RCPT TO:<xxx@aol.com>,
2014-10-13T14:41:42.552Z,Internet Outbound,08D1B4FCB0EBBB8A,31,10.10.0.30:19282,152.163.0.67:25,<,250 2.1.5 Ok,
2014-10-13T14:41:42.552Z,Internet Outbound,08D1B4FCB0EBBB8A,32,10.10.0.30:19282,152.163.0.67:25,>,DATA,
2014-10-13T14:41:42.583Z,Internet Outbound,08D1B4FCB0EBBB8A,33,10.10.0.30:19282,152.163.0.67:25,<,354 End data with <CR><LF>.<CR><LF>,
2014-10-13T14:41:45.688Z,Internet Outbound,08D1B4FCB0EBBB8A,34,10.10.0.30:19282,152.163.0.67:25,<,250 2.0.0 Ok: queued as 8A7497000009F,
2014-10-13T14:41:45.688Z,Internet Outbound,08D1B4FCB0EBBB8A,35,10.10.0.30:19282,152.163.0.67:25,>,QUIT,
2014-10-13T14:41:45.719Z,Internet Outbound,08D1B4FCB0EBBB8A,36,10.10.0.30:19282,152.163.0.67:25,<,221 2.0.0 Bye,
2014-10-13T14:41:45.719Z,Internet Outbound,08D1B4FCB0EBBB8A,37,10.10.0.30:19282,152.163.0.67:25,-,,Local
2014-10-13T14:42:01.132Z,Internet Outbound,08D1B4FCB0EBBB88,27,10.10.0.30:19263,74.208.5.21:25,*,,"HandleError has encountered a suspicious connection reset from a remote, non-mailbox transport server (will retry in 00:10:00)."
2014-10-13T14:42:01.132Z,Internet Outbound,08D1B4FCB0EBBB88,28,10.10.0.30:19263,74.208.5.21:25,-,,Remote