DMARC tells receiving mail servers what to do with messages that fail SPF or DKIM checks, and can send you reports. Google, Yahoo and Microsoft now expect a DMARC record from many senders.
Set up SPF and DKIM first (see How to add an SPF record).
Add the record
- In cPanel, open Zone Editor and click Manage beside your domain.
- Click Add Record and choose TXT.
- Name:
_dmarc.yourdomain.co.uk - Record:
v=DMARC1; p=none; rua=mailto:you@yourdomain.co.uk - Click Save Record.
Policy options
p=none– monitor only; nothing is blocked. Start here.p=quarantine– failing mail goes to spam.p=reject– failing mail is refused.
Watch the reports for a few weeks to confirm all your legitimate email passes, then tighten the policy to quarantine and eventually reject.
