Hello,
For few months now ( and maybe more) we encountered random SMTP delay for mail sent via our internal smtp.
When I analyse the logs, I can see that the delay is on the SMTPReceive log between "354 Start mail input" step and"*,,Proxy destination(s) obtained from OnProxyInboundMessage event" step .
Do you have any idea of something that can explain this behaviour ?
Environnement : Exchange 2016
For instance:
C:\ExchangeDBs\Logs\Logs\FrontEnd\SmtpReceive\RECV2020081706-1.LOG (56 hits)
Line 13470: 2020-08-17T06:28:02.073Z,XXXXXXXXXXXX,XXXX,0,XXXX,XXXX:XXXX,+,,
Line 13471: 2020-08-17T06:28:02.074Z,XXXXXXXXXXXX,XXXX,1,XXXX,XXXX:XXXX,>,"220 XXXX.XXXX.XXXX.XX Microsoft ESMTP MAIL Service ready at Mon, 17 Aug 2020 08:28:01 +0200",
Line 13472: 2020-08-17T06:28:02.075Z,XXXXXXXXXXXX,XXXX,2,XXXX,XXXX:XXXX,<,EHLO XXXX,
Line 13473: 2020-08-17T06:28:02.075Z,XXXXXXXXXXXX,XXXX,3,XXXX,XXXX:XXXX,>,250 XXXX.XXXX.XXXX.XX Hello [XXXX] SIZE 37748736 PIPELINING DSN ENHANCEDSTATUSCODES STARTTLS X-ANONYMOUSTLS AUTH NTLM X-EXPS GSSAPI NTLM 8BITMIME BINARYMIME
CHUNKING XRDST,
Line 13474: 2020-08-17T06:28:02.077Z,XXXXXXXXXXXX,XXXX,4,XXXX,XXXX:XXXX,<,MAIL FROM:<XXXXX@XXXX.com>,
Line 13475: 2020-08-17T06:28:02.077Z,XXXXXXXXXXXX,XXXX,5,XXXX,XXXX:XXXX,*,XXXX;2020-08-17T06:28:02.073Z;1,receiving message
Line 13475: 2020-08-17T06:28:02.077Z,XXXXXXXXXXXX,XXXX,5,XXXX,XXXX:XXXX,*,XXXX;2020-08-17T06:28:02.073Z;1,receiving message
Line 13476: 2020-08-17T06:28:02.077Z,XXXXXXXXXXXX,XXXX,6,XXXX,XXXX:XXXX,>,250 2.1.0 Sender OK,
Line 13477: 2020-08-17T06:28:02.078Z,XXXXXXXXXXXX,XXXX,7,XXXX,XXXX:XXXX,<,RCPT TO:<XXXXXX@XXXXX.com>,
Line 13478: 2020-08-17T06:28:02.078Z,XXXXXXXXXXXX,XXXX,8,XXXX,XXXX:XXXX,>,250 2.1.5 Recipient OK,
Line 13479: 2020-08-17T06:28:02.080Z,XXXXXXXXXXXX,XXXX,9,XXXX,XXXX:XXXX,<,DATA,
Line 13480: 2020-08-17T06:28:02.080Z,XXXXXXXXXXXX,XXXX,10,XXXX,XXXX:XXXX,>,354 Start mail input; end with <CRLF>.<CRLF>,
******** lines about others SMTP email ********
Line 14252: 2020-08-17T06:30:00.138Z,XXXXXXXXXXXX,XXXX,11,XXXX,XXXX:XXXX,*,,Proxy destination(s) obtained from OnProxyInboundMessage event. Correlation Id:XXXXXX9
Line 14260: 2020-08-17T06:30:00.972Z,XXXXXXXXXXXX,XXXX,12,XXXX,XXXX:XXXX,>,"250 2.6.0 <XXXX@XXXX.XXXX.XXXX.XX> [InternalId=XXXXXXXX, Hostname=XXXX.XXXX.XXXX.XX] 9475 bytes in 0.755, 12,252 KB/sec Queued mail for delivery",
Line 14261: 2020-08-17T06:30:00.973Z,XXXXXXXXXXXX,XXXX,13,XXXX,XXXX:XXXX,-,,Remote(ConnectionAborted)
Thanks a lot in advance for your help !
Florian A