Postfix - Do not send e-mail to one domain

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

  1. h3kns

    h3kns New Member

    Hello
    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


    Code:
     mail amavis[2680]: (02680-17) Passed CLEAN {RelayedOutbound}, MYNETS/MYUSERS LOCAL [127.0.0.1]:54853 [127.0.0.1] <h3k@xxx.com.pl> -> <xxxx@cccc.pl>, Queue-ID: 34B7E2CC061A, Message-ID: <6b49c30544fc72c7b53f9363a3973269@xxxxx.com.pl>, mail_id: b-1o7ochS0BA, Hits: -9.997, size: 1294, queued_as: CA02F2CC1683, 577 ms
     mail postfix/smtp[7033]: 34B7E2CC061A: to=<xxxx@cccc.pl>, relay=127.0.0.1[127.0.0.1]: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:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as CA02F2CC1683)
    Then after 2-3 minites i get

    Code:
    mail postfix/smtp[7040]: CA02F2CC1683: lost connection with ccc.pl[xx.xxx.xx.xx] while sending end of data -- message may be sent more than once
    
    or

    Code:
     mail postfix/smtp[8735]: D48A02CC20C5: to=<xxxx@cccc.pl>, relay=xxxx.cccc.pl[xx.xx.xxx.xx]:25, delay=346, delays=0.07/0/46/300, dsn=4.4.2, status=deferred (host xxx.cccc.pl[78.133.187.22] said: 421 4.4.2 xxx.cccc.pl 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.

    Code:
    net.ipv4.tcp_window_scaling = 0
     

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