Set a Message Size Limit in WHM

  • Updated on Apr 13, 2026
  • Published on Feb 8, 2023
  • 1 minute(s) read
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  1. Log in to WHM.

  2. Under ' Service Configuration' select ' Exim Configuration Manager' and go into the  ‘Advanced Editor’.

  3. Search for 'Add additional configuration setting ' and click to select from a drop down list.

  4. Select 'message_size_limit'.

  5. Enter the desired limit (default is 50 MB).

  6. To finish select 'Save'.

Note: If you do not also increase the maximum allowed attachment size in Webmail, you will still be unable to attach files larger than 50 MB in Webmail.