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Thread: Strange backend condition

  1. #1
    Join Date
    Jul 2007
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    Default Strange backend condition

    We are seeing a strange error on our mtas where they will suddenly fail communications with the stores. An excerpt from the logs:

    Sep 28 20:42:22 mta03 postfix/smtpd[8327]: disconnect from mail05.philasd.org[170.235.1.95]
    Sep 28 20:42:22 mta03 postfix/smtpd[8326]: connect from mail05.philasd.org[170.235.1.95]
    Sep 28 20:42:22 mta03 postfix/smtpd[8326]: disconnect from mail05.philasd.org[170.235.1.95]
    Sep 28 20:42:22 mta03 postfix/smtpd[8325]: connect from mail05.philasd.org[170.235.1.95]
    Sep 28 20:42:22 mta03 postfix/smtpd[8325]: disconnect from mail05.philasd.org[170.235.1.95]

    This can happen for a long time, thousands of entries and then the condition sometimes goes away. It's been re-occuring at a high frequency. Running tcpdump during the event reveals an error in the LMTP conversation where the store indicated no valid recipients.

    This occurs after the MAIL FROM: is sent by the mta, the store says OK, but the mta does not send RCPT TO: but instead sends DATA. Then the store responds with no valid recipients.

    I'm thinking it's a malformed message but this is presumably happening after it's gotten through our mtas?

    Thoughts/Ideas/Suggestions?

  2. #2
    Join Date
    Jul 2007
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    Default

    So no one else is experiencing this??

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