mail delivery failure

Discussion in 'Installation/Configuration' started by xanela, Jan 13, 2015.

  1. xanela

    xanela Member

    Hello everyone.
    On my server installed on debian wheezy perfect server following the manual.
    The server is installed, postfix, deovecot, apache 2.
    I just detect that some of my emails are not delivered siende. Apparently the problem is the connection time.

    The mistake that for me is the following:

    B22562A817EF Mon January 12 6183 12:00:31 concello@tra*****.es
    (.. Conversation with Mail.X ****.es [85.36. *. *] Timed out while sending end of data - message be sent no later than May eleven)

    Someone tell me what could be causing the problem and how it could solve ??
    thank you very much
    Last edited: Jan 13, 2015
  2. till

    till Super Moderator Staff Member ISPConfig Developer

    Is the server hosted in a datacenter wit a fixed IP address?
  3. xanela

    xanela Member

    my server is in ovh and has a fixed ip
  4. till

    till Super Moderator Staff Member ISPConfig Developer

    Check if your server is on a blacklist, e.g. at and check if your server has a high load, e.g. by running the command "top" on the shell.
  5. xanela

    xanela Member

    I have checked the blacklists and neither ip or domains found in any blacklist.
    Furthermore the server load is good.

    so that is not the reason for the time out for some post only.
  6. florian030

    florian030 Well-Known Member HowtoForge Supporter

    The timeout could also be a problem on the remote-site. Can you telnet to the remote-server on port 25?
  7. xanela

    xanela Member

    Hello everyone.
    After reviewing and testing, it seems that the reason that the emails fail to be delivered is by the size of the headers.

    How could adjust the size of the head of the mails?

    thank you very much

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