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Thread: 00:00:00 INCOMPLETE-SESSION errors

  1. #1
    fbongartz is offline Intermediate Member
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    Default 00:00:00 INCOMPLETE-SESSION errors

    Hello volunteers,

    I'm trying to understand why an email never arrived at our zcs server. We have an external email provider who receives all mail for our domain and forwards them to our internal zimra mail server.

    In their logs (merak mail server), they have the following at the time the message was sent (xxx.xxx.xxx.xxx is the sender's mta, yyy.yyy.yyy.yyy is the public ip of our zimbra server):
    Code:
    xxx.xxx.xxx.xxx   [0A80] 11:33:06 <<< MAIL FROM:<sender@senderdomain.com> SIZE=608505
    
    xxx.xxx.xxx.xxx   [0A80] 11:33:06 >>> 250 2.1.0 <sender@senderdomain.com>... Sender ok
    
    yyy.yyy.yyy.yyy  [0A80] 11:33:07 Client session >>> MAIL From:<sender@senderdomain.com>
    
    yyy.yyy.yyy.yyy  [0A80] 11:33:07 Client session >>> MAIL From:<sender@senderdomain.com>
    
    yyy.yyy.yyy.yyy  [0A80] 11:33:07 Client session >>> MAIL From:<sender@senderdomain.com>
    
    SYSTEM          [0DB4] 11:33:08 Client session *** <sender@senderdomain.com> <recipient1@ourdomain.com> 1 608690
    00:00:00 INCOMPLETE-SESSION HVF45507
    
    SYSTEM          [0298] 11:33:08 Client session *** <sender@senderdomain.com> <recipient2@ourdomain.com> 1 608690
    00:00:00 INCOMPLETE-SESSION HVF45507
    
    xxx.xxx.xxx.xxx   [0A80] 11:33:08 *** <sender@senderdomain.com> <recipient1@ourdomain.com> 3 608505 00:00:00 OK HVF45507
    
    SYSTEM          [0B78] 11:33:08 Client session *** <sender@senderdomain.com> <recipient3@ourdomain.com> 1 608690
    00:00:00 INCOMPLETE-SESSION HVF45507
    So I checked our logs at /var/log/zimbra.log. The only suspicious entry that was written roughly at the same time is the following:
    Code:
    Nov 24 11:34:28 mail postfix/anvil[3247]: statistics: max connection rate 5/60s for (smtp:zzz.zzz.zzz.zzz) at Nov 24 11:30:19
    Nov 24 11:34:28 mail postfix/anvil[3247]: statistics: max connection count 2 for (smtp:zzz.zzz.zzz.zzz at Nov 24 11:29:45
    Nov 24 11:34:28 mail postfix/anvil[3247]: statistics: max cache size 2 at Nov 24 11:25:11
    (zzz.zzz.zzz.zzz is the public ip of our email provider's merak server)

    My question is 1. are postfox/anvil's log entries errors or just normal statistics? And 2. any ideas on why the session would fail?

    Cheers,

    Fabrice

  2. #2
    phoenix is online now Zimbra Consultant & Moderator
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    Default

    Quote Originally Posted by fbongartz View Post
    My question is 1. are postfox/anvil's log entries errors or just normal statistics?
    They are just normal statistics and nothing to do with your problem.

    Quote Originally Posted by fbongartz View Post
    And 2. any ideas on why the session would fail?
    Unfortunately I've no idea, I know nothing about Merak mail servers. That might be a question for a forum on Merak Mail Server or one of these links: +postfix +"INCOMPLETE-SESSION " - Yahoo! Search Results Are you sure the recipient actually exists in the Zimbra mail server (see the last link in the search I've given you above)?
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  3. #3
    fbongartz is offline Intermediate Member
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    Quote Originally Posted by phoenix View Post
    They are just normal statistics and nothing to do with your problem.
    Ah, good to know. Thank you.

    Quote Originally Posted by phoenix View Post
    Unfortunately I've no idea, I know nothing about Merak mail servers. That might be a question for a forum on Merak Mail Server or one of these links: +postfix +"INCOMPLETE-SESSION " - Yahoo! Search Results Are you sure the recipient actually exists in the Zimbra mail server (see the last link in the search I've given you above)?
    Yes, the recipient exists. What's strange is that the problem seems to be sporadic in nature. Later that day, the exact same mail was successfully re-sent and received by the same recipients. Furthermore, there seems to be no hint at all regarding the problem in the zimbra logs, which leads me to believe that it's not our server that's doing something wrong.

    I'm even considering connection problems or maybe some kind of firewall issue.

  4. #4
    phoenix is online now Zimbra Consultant & Moderator
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    Quote Originally Posted by fbongartz View Post
    I'm even considering connection problems or maybe some kind of firewall issue.
    As this event is (apparently) random and works sometimes and not others I'd also suspect it was a connection problem.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

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