We often get requests/questions/complaints about the Apple mail client not correctly connecting to the server or having problems receiving or sending emails. Fortunately, the majority of these queries are the result of installation issues. The following tutorial shows how to connect to a VPS with the Apple Email client and demonstrates it with the SSL settings. By default InMotion Hosting VPS servers use un-signed certificates but the email client can be setup to stop the messages saying “this server can not be verified.” With the correct setup, the Apple Email client should send and receive emails with no problem.
Publisher: InMotion Hosting
You can watch this video also at the source.