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Thread: Zimbra Server very slow - Too many SMTP connections

  1. #11
    uxbod's Avatar
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    you could look at putting in a second card for local site traffic, especially if you primary NIC is getting loaded by external traffic. Or look at using bandwidth throttling using TC.

  2. #12
    pc-nico is offline Active Member
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    i think, i have found the problem, but not the answer....

    i only have the Problem, that the server donīt accept SMTP connecten from
    WEB-Mailer or Thunderbird...

    after i disconnect the Internet-Access i get acces to smtp to send a mail
    using thunderbird...

    The Problem are to many smtp-connects from outside, so not enough for inside
    available...

    You Wrote
    You should look at throttling the connections either by using Postfix
    can you give me an advice how?
    Sorry for my bad english

  3. #13
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    You could add a SMTP port only for internal clients :- Adding additional SMTP listener ports - Zimbra :: Wiki

  4. #14
    pc-nico is offline Active Member
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    good idee.... but the webmailer use the default smtp port.....

    is they no way to block the many requests?
    Sorry for my bad english

  5. #15
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    Postfix Connection Tuning

    NOTE: I have removed your other post as we are attempting to resolve within this one. Please do not start a new thread for the same thing.
    Last edited by uxbod; 06-05-2008 at 02:34 AM.

  6. #16
    pc-nico is offline Active Member
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    sorry for double posting... but i think you the only one how read this topic, because
    the subject donīt describe the problem....

    thx
    Sorry for my bad english

  7. #17
    pc-nico is offline Active Member
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    the options
    smtpd_hard_error_limit = 3
    smtpd_soft_error_limit = 2


    are already set :-(
    Sorry for my bad english

  8. #18
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    Other options are available :- SMTPD_CLIENT_CONNECTION_RATE_LIMIT

  9. #19
    pc-nico is offline Active Member
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    smtpd_client_connection_rate_limit = 120

    takes no effect :-(
    Sorry for my bad english

  10. #20
    phoenix is online now Zimbra Consultant & Moderator
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    Quote Originally Posted by pc-nico View Post
    smtpd_client_connection_rate_limit = 120

    takes no effect :-(
    I assume you restarted Postfix?
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

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