SMTP Will not start in IIS 6

Posted on 2011-10-07
Last Modified: 2012-05-12
I am trying to start my SMTP service under IIS6 on server 2008, but it keeps throwing an error, in the windows log it says
 "No usable TLS server certificate for SMTP virtual server instance '1' could be found. TLS will be disabled for this virtual-server."

Would be grateful for any help.

Question by:Soluga
    LVL 1

    Author Comment

    I chaned the port number and it started, so something is using port 25, is there a way to see what is using port 25?
    LVL 1

    Author Comment

    A service called  MESMTPCS was using the port, what does this service do?
    LVL 5

    Accepted Solution

    It is Mail Enable SMTP Connector Service.  It could have gotten onto your server a couple of ways.  1) It could be used for an application to send mail out and not have to go through a mail server, like Exchange or Notes 2) could be a virus that is sending out spam mail not going out through your mail server.  So, it could be good or it could be very bad.
    I would go to your Services on that server and STOP that services from running.  See if anything is affect by it.  If nothing, DISABLE it.
    So you have any apps on that server that should be sending out mail not routed to your email server??

    Hope that helps!

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