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Thread: Changed ISP now outgoing mail is deferred

  1. #1
    cjm51213 is offline Active Member
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    Default Changed ISP now outgoing mail is deferred

    Hi Folks,

    Two days ago I changed ISP. This means that my public IP changed, but nothing internal to my network has changed. I have updated DNS registration and reverse DNS (tryx.org, and 107.128.74.228, respectively) I have rebooted my Zimbra server.

    Incoming mail was restored as soon as my DNS updates had percolated through the net. As of this morning, I have incoming mail with no problem, as nearly as I can tell, but outgoing mail is failing with the message in Zimbra.log, "Connection timed out". Any thoughts?

    Thanks for the help,

    Chris.

  2. #2
    chauvetp is offline Elite Member
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    Is your ISP blocking port 25 outbound?
    Can you test connections from the Zimbra box? Login via SSH and try opening a connection to an outside SMTP server via telnet:
    telnet gmail-smtp-in.l.google.com 25

    Were you previously (before changing ISPs) routing your outbound mail through your old ISP's mail server?
    ---
    Paul Chauvet
    State University of New York at New Paltz

  3. #3
    cjm51213 is offline Active Member
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    Quote Originally Posted by chauvetp View Post
    Is your ISP blocking port 25 outbound?
    Geeze!!! This used to happen frequently with ComCast. It never even occurred to me that this could be the problem, but tests show that it is!

    Thanks very much for the help,

    Chris.

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