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Thread: Unable to send emails with attachment over 5mb

  1. #1
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    Default Unable to send emails with attachment over 5mb

    I'm sure this is a setting somewhere, but can't seem to find it.
    Can someone point me in the right direction?

    When a user attempts to send an email with an attachment over 5mb they get a message like this:
    ------
    Your message did not reach some or all of the intended recipients.
    Subject:
    Sent: 10/23/2009 11:36 AM
    The following recipient(s) could not be reached:
    'user@FQDN.com' on 10/23/2009 11:43 AM
    552 5.3.4 Error: message file too big
    ------

  2. #2
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    If this is a user sending to someone else in your own domain, check the Admin Console->Global Settings->MTA tab->Maximum Message Size.

    If the rejection message is a message the user receives when they send to a user outside your domain, then it could be a limitation set by the ISP (yours or the recipient's). You might be able to determine where the bounce came from by looking at the email headers of the rejection message. In that case, you would probably need to find an alternate email address or method to get the attachment to the recipient.

  3. #3
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    Default

    What is the maximum limit of attachment you have on your mail server?

  4. #4
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    My settings are the defaults.
    I have tried both sending within the domain and to a gmail account. Both get rejected.

  5. #5
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    Default

    zmprov mcf zimbraFileUploadMaxSize 838860800
    ...Will give you 100MB attachments.

  6. #6
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    Actually, 838860800 gives you 100MiB (mebibyte) attachments. 800000000 gives you 100MB. It's been over a decade. The IEC must be obeyed.

  7. #7
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    Default

    Actually, 104857600 gives you 100MB. 800000000 gives you 762.939453125MB, so we were both wrong.

  8. #8
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    800000000b x 1B/8b x 1KB/1000B x 1MB/1000KB = 100MB
    For full MB, the bit equivalent will always end in at least 6 zeroes.

  9. #9
    phoenix is offline Zimbra Consultant & Moderator
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    I think you'll find the correct size for a 100MB file is 838860800 bits, you can check the size here: Fatal Error
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  10. #10
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    Jeez, I even show the math, and still get contradicted. Nope, 100MB is 800000000. Your link didn't work for me, but I found the working one through Google. It uses 1024 for the multiplier in the calculator, and is thus incorrect. This seems to be an old page. Though it mentions the IEC standard, it states: "The new IEC International Standards, which are not commonly used yet...". In fact, the standard has been in common usage for many years. There are any number of MB calculators on the internets. Here's one: Bit Calculator - Convert between bits/bytes/kilobits/kilobytes/megabits/megabytes/gigabits/gigabytes.. Change the Notation Type to '"kilo is 1000'. You will note that this page also has a link to the National Institute of Standards, Definitions of the SI units: The binary prefixes.

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