How do I add a DMARC record in cPanel?
You can easily create a DMARC record in cPanel using the following guide:
From the Domains menu item in cPanel, click Zone Editor
Find the domain name you want to add the DMARC record to and click the Manage button
Click the down arrow to the right of "+ Add Record" to expand the options
Click Add "DMARC" Record
From there you can click the Save Record button to save the DMARC record as-is (which is sufficient for general use) or you can fine tune it to your preferences.