outlook.com keeps knocking back photos under 20mb

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  1. Posts : 12,425
    Win10 Version 21H2 Pro and Home, Win11 Pro

    And the Maximum may also be with the recipient's ISP. Or in other words, on both ends.
      My Computers

  2. Posts : 3,257
    Windows 10 Pro

    lach222 said:
    outlook.com wont send a file with 4 photo's it says its exceeds the maixium limit which is 20mb. however when I look at the emails that I'm trying to send they are only 16.8mb.... can someone tell me how to fix this
    The problem here is that you cannot send binary files directly through email. They must be "encoded", typically in a format called Base64. This is done automatically by your email program. The issue here is that encoding is not a 1:1 correlation, but rather closer to a 1:1.5 correlation. That means any binary file you send in email is automatically 1.5x larger than the actual file on disk.

    You can read more about it here:

    Why are emailed attachments larger than the original file?
    Last edited by Mystere; 30 Aug 2016 at 08:45.
      My Computer

  3. Posts : 21
    64 bit operating system
    Thread Starter

    ok mate cheers for that
      My Computer


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