The default size of email attachment in cpanel is 50MB, but if you want to change this then you can follow below steps:
- Login to WHM.
- Click on “Exim Configuration Manager” under “Service Configuration”.
- Here click on “Advanced Editor” to making changes.
- You will find “Add additional Configuration Setting” option after scrolling, click on it.
- Choose “message_size_limit” option and enter the required value.
- Click on “Save”.