Postfix - Do not send e-mail to one domain

Discussion in 'Installation/Configuration' started by h3kns, Oct 15, 2015.

  1. h3kns

    h3kns New Member

    I have a big problem i have a Postfix e-mail server almost everything works well but i have problem with one domain .
    I have all the time when i wont send mail i have

     mail amavis[2680]: (02680-17) Passed CLEAN {RelayedOutbound}, MYNETS/MYUSERS LOCAL []:54853 [] <[email protected]> -> <[email protected]>, Queue-ID: 34B7E2CC061A, Message-ID: <[email protected]>, mail_id: b-1o7ochS0BA, Hits: -9.997, size: 1294, queued_as: CA02F2CC1683, 577 ms
     mail postfix/smtp[7033]: 34B7E2CC061A: to=<[email protected]>, relay=[]:10024, delay=0.76, delays=0.11/0.01/0/0.64, dsn=2.0.0, status=sent (250 2.0.0 from MTA(smtp:[]:10025): 250 2.0.0 Ok: queued as CA02F2CC1683)
    Then after 2-3 minites i get

    mail postfix/smtp[7040]: CA02F2CC1683: lost connection with[] while sending end of data -- message may be sent more than once

     mail postfix/smtp[8735]: D48A02CC20C5: to=<[email protected]>,[]:25, delay=346, delays=0.07/0/46/300, dsn=4.4.2, status=deferred (host[] said: 421 4.4.2 Error: timeout exceeded (in reply to end of DATA command))
    Please Help ME
  2. Hello,

    Can you please try to update your sysctl.conf file with the following parameters and let us know.

    net.ipv4.tcp_window_scaling = 0

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