Add option to compress incoming email
In Dovecot, the "mdbox" mailbox format is supported starting in cPanel v58.
In addition, the mdbox mailbox format supports email compression (within dovecot official), although that is not a settable option through cPanel. Dovecot does all the work, all you have to do is turn on the option in the dovecot config.
Using compression, you can save significant server space because most email is just text which is easily compressed.
I have been using this email compression on my cpanel server with v58, and it is working perfect. I only had to modify the dovecot local template file to add the compression options... and it just simply works. The end users see absolutely no change because the emails are compressed/uncompressed by the server on the fly as needed.
Making this an official option through the dovecot settings in the whm gui would be a great idea... and I cannot think of any disadvantages to it, because dovecot handles all of it automatically.
So, I'm not asking you to make it possible, because it already works great. I'm asking to make it an official option in the whm gui so I don't have to use a dovecot local template.