What this is
A guide to creating or updating your DMARC policy.
Why it matters
DMARC tells inbox providers what to do if your authentication fails.
What to do
Log into your domain provider
Go to DNS settings
Add or update a TXT record for: _dmarc.yourdomain.com
Set your policy
Example DMARC records
Start with monitoring:
v=DMARC1; p=none; rua=mailto:[email protected]
Stronger enforcement:
v=DMARC1; p=quarantine; rua=mailto:[email protected]
Strict enforcement:
v=DMARC1; p=reject; rua=mailto:[email protected]
What to do next
Start with p=none
Monitor results
Move to stricter policies once stable
Common mistakes
Skipping straight to strict policies
Incorrect formatting
Not monitoring reports
Expert insight
DMARC is most powerful when used gradually, not aggressively.