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Mail not flowing, unable to telnet to port 25 (Exchange 2013)

    Question

  • We have an Exchange 2013 server which was working fine, but after a failed CU2 upgrade, we rolled back to the restore and since then mail isn't flowing.  All emails go into drafts.

    We can telnet to port 25 locally on the server, but not from anywhere else, the connection is cut remotely.

    There is no AV, nor any firewalls in the way.  Servers in the same subnet are unable to connect on port 25...but can connect on port 80 for example, or 2525.

    We've restored from various backups...all the same.  Running out of ideas...

    All thoughts very welcome.

    Thursday, August 01, 2013 8:45 AM

Answers

  • Hi,

    I recommend you to check the Transport Submission service whether normally,if all email go into drafts.

    and have you got any error feedback when you telnet to 25 port failed? If there are,please post out.

    you also need to check your event log about system and application.

    Thanks.


    Regards, Please mark it as an answer if it really helps you.

    Friday, August 02, 2013 9:31 AM

All replies

  • Hi!

    I had that with 2010 server... What was bothering it was time. Make sure that the time is correct, wait for about an hour or so, then it should start working... Also with correct time, reboot the server once more...

    Thursday, August 01, 2013 10:43 AM
  • Thanks for the reply, the time settings are all good.

    Totally stumped on this one  :-/

    Thursday, August 01, 2013 11:37 AM
  • Hi,

    I recommend you to check the Transport Submission service whether normally,if all email go into drafts.

    and have you got any error feedback when you telnet to 25 port failed? If there are,please post out.

    you also need to check your event log about system and application.

    Thanks.


    Regards, Please mark it as an answer if it really helps you.

    Friday, August 02, 2013 9:31 AM