552 5.3.4 Error: message file too big

Discussion in 'Parallels Plesk Panel 10.x for Linux Problems, Suggested Fixes, and How-To' started by TobiasG, May 31, 2011.

  1. TobiasG

    TobiasG New Member


    if a costumer tries to send an email with a bigger attachment, the email is rejected:
    Protokoll: SMTP, Serverantwort: '552 5.3.4 Error: message file too big', Port: 25, Secure (SSL): Nein, Serverfehler: 552, Fehlernummer: 0x800CCC6D
    I'm using Qmail and the max filesize in the configuration is set way beyond the size of the attachment.
    I also changed the settings in Plesk mailconfiguration, so there shouldn't be a problem, too.
    I can't find any other way to change some setting concerning this subject.

    When I try to send a message with the same attachment, but my own emailadress (same server), I got no problem.
    All packages have bin migrated from version 9, but I also tried deleting the affected package and creating a new one, but without any difference in result.

    The whole problem seem to occur since upgrading from version 9 to 10.

    Any idea?

    Best regards,

  2. IgorG

    IgorG Parallels Team

    Looks like the problem is that when attachemnt encoded with Base64 encoding every 3 bytes of data are turned into 4 bytes thus increasing size of attachment by 25%. For example, in case of 8 Mb attachment final message size would be 10.6 megabytes (or 11184810 bytes) which will exceed limit set on the server.
    You can check current SMTP message limit on Qmail server with:
  3. TobiasG

    TobiasG New Member

    Thanks so far. Unfortunately this can't be the Problem, because the attachments size is about 30MB and the Qmail limit was set to 209715200 Bytes in "..../databytes" (200 MB ).
    It also seems not to occur in every package I created in Plesk (got no probs with my own package/email).

    Any other idea?

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