Outlook Incremental Total File Size


  • Hi,

       I am experience the problem of during send the files  (eg. With attachment of 3MB), the recipients will receive it as 4.92 MB.  Then, I have tried out forward the same email for myself (without adding in text or files) but, include  the attachment, the file size receipt shows 7MB.  It seems double up.

    What could it be the issue  and how to resolved this issue ?  I understand that this is due to the OUTLOOK Encoding but, somehow, I have change to plain text and it still face the same problem.

    Please  assist us on problem resolving this issue.

    • Moved by George Hua Tuesday, November 19, 2013 9:13 AM outlook product related
    Monday, November 18, 2013 9:18 AM


All replies

  • Hi,

    Welcome to MSDN forum.

    Since this issue is more related to Outlook product, I have moved this thread to TechNet Outlook for IT Pro Forum for more effective responses.

    Thanks for your understanding.

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    Tuesday, November 19, 2013 9:12 AM
  • Hi

      Appreaciate for the update.  Please do kindly update us once you have any good info to share.

    Awaiting for the update.

    Thank you

    Wednesday, November 20, 2013 12:40 AM
  •    I am experience the problem of during send the files 

    From where and how exactly are you "sending the files"? From another program or by attaching the files to a new email message within Outlook?

    If from another program - which one? Does the same problem occur when the file is attached to a message within Outlook?

    What kind/type of file is being sent/attached?

    Karl Timmermans [Outlook MVP] "Outlook Contact Import/Export/Data Mgmt"

    Wednesday, November 20, 2013 6:47 AM
  • Are you using Outlook for Mac ? (it's a somewhat known issue on Outlook for Mac, that attachments are re-encoded and will "grow" in size)

    (Please take a moment to "Vote as Helpful" and/or "Mark as Answer", where applicable.
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    Wednesday, November 20, 2013 11:51 AM
  • No,  I am not using MACINTOSH for OUTLOOK.   I  am using Windows based.

    Thursday, November 21, 2013 12:29 AM
  • Hi,

    Did you send a digital signed or encrypted email message? If so, please check the following KB article:


    Steve Fan
    TechNet Community Support

    Monday, November 25, 2013 4:00 PM