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smtp banner x

  • port 443 won't open on SBS2008 after certificate change

    Hello all,

    Because I had a problem with the SMTP banner on 2 Windows SBS 2011 servers I search the internet.
    When I go to and I do the SMTP test the output was:

    OK - xx.xx.xx.xx resolves to

    Warning - Reverse DNS does not match...
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  • raymann
    started a topic SMTP banner (validity)

    SMTP banner (validity)

    My exchange server recently started getting bounce backs from The bounce back is a very generic message and I have confirmed that I am not on the blacklist.
    I ran the Mail Server Test Center and everything checks out fine BUT when i run the Domain Doctor Test i fail...
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  • Reverse DNS does not match SMTP Banner

    Setup as follows:
    Exchange 2010 SP1. Send and Receive connectors are configured with the correct string ( on all containers.
    Last week contacted ISP and changed the A and PTR records (to match the above string) for public IP address.
    Still getting the same warning....
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