Step 1.
Login to WHM
Step 2.
Navigate to Home > DNS Functions
Step 3.
Navigate to Home > DNS Functions > Edit DNS Zone
Step 4.
Choose the Zone to Edit & click 'Edit' button
Step 5.
Add an entry below the line
Here you must choose how you want receiving servers to handle email from your server that fails DKIM and SPF validation
None | v=DMARC1; p=none; sp=none; rf=afrf; pct=100; ri=86400 |
Reject * | v=DMARC1; p=reject; sp=none; rf=afrf; pct=100; ri=86400 |
Quarantine | v=DMARC1; p=quarantine; sp=none; rf=afrf; pct=100; ri=86400 |
As an alternative you can have your server email you a report of failed DMARC validations by adding an email address, as follows
None | v=DMARC1; p=none; sp=none; ruf=mailto:username@example.com; rf=afrf; pct=100; ri=86400 |
Reject | v=DMARC1; p=reject; sp=none; ruf=mailto:username@example.com; rf=afrf; pct=100; ri=86400 |
Quarantine | v=DMARC1; p=quarantine; sp=none; ruf=mailto:username@example.com; rf=afrf; pct=100; ri=86400 |
* Recommended
Step 6. - optional
Check your DNS enry has been added to DNS zone
After propogation of your DNS you can check your DMARK record in a DMARC Record Lookup external diagnostic tool like MX Toolbox.
What is DMARK? Click Here