A DMARC record provides important instructions for how messages failing email authentication should be handled by mailing servers.
Using DMARC records, you can control if email receivers should reject, quarantine, or do nothing with a suspicious email.
It’s important to create DMARC record because it helps servers distinguish legitimate emails from fake ones.
The records can be added using the DNS management feature in your control panel.
cPanel
Under Domains > Zone Editor
DirectAdmin
Under Account Management > DNS Management
Add a TXT type record
Name - blank or @
Type - TXT
Value - v=DMARC1; p=reject; rua=mailto:[email protected]
(Replace the mailto email address with one of your own)