How to add an MX Record in cPanel using DNS Zone Editor:
1. Login to your cPanel, at the Domain section Click on Zone Editor
2. Click on MX Record in the records listed
3. A pop-up opens. Enter the following details i.e. Priority and Destination (e.g. Priority : 0, Destination: mail.shostdemo.tk)
and click on Add an MX Record.
4. MX Record is successfully created.
For verification, Click on Manage beside the DNSSEC:
5.Scroll down to see the Record you added