Disable Attachment Limit in Outlook 2013

Internet email account (POP3, IMAP, HTTP)

To modify the default attachment limit size in Outlook 2013 for an Internet email account yourself, follow these steps: 

  1. Exit Outlook.
  2. Start Registry Editor.
  3. Locate and then select one of the following registry subkeys:

    HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\Preferences
    HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\15.0\Outlook\Preferences
    Note Manually create the path in the registry if it does not currently exist.
  4. Add the following registry data under this subkey:

    Value type: DWORD
    Value name: MaximumAttachmentSize
    Value data: An integer that specifies the total maximum allowable attachment size. For example, specify 30720 (Decimal) to configure a 30-MB limit.
    Notes
    • Specify a value of zero (0) if you want to configure no limit for attachments.
    • Specify a value that is less than 20 MB if you want to configure a limit that is less than the default 20 MB.
  5. Exit Registry Editor
  6. Start Outlook.

[1] http://support.microsoft.com/kb/2813269

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