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] <[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=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=<[email protected]>, 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
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
