How to enable email compression. This will only compress messages after you enable this setting. It does not compress existing messages.
- Go to WHM » Service Configuration » Mailserver Configuration.
- Enable Compress Messages.
You may also tweak the Compression level by entering an integer between
0 is the default compression level and
9 is the highest compression level.
For more information, please read the following article: https://docs.cpanel.net/whm/service-configuration/mailserver-configuration#compress-messages.