Fix guide
DMARC policy missing or too weak
Why DMARC matters for sender trust and how to add a safe policy without breaking legitimate mail.
WarningWhy this matters
DMARC tells mailbox providers how your domain expects SPF and DKIM to align. A missing or weak policy does not automatically send mail to spam, but it removes an important sender-identity signal.
When a placement report warns about DMARC, treat it as a setup issue before you spend time rewriting copy. Authentication problems affect every campaign that uses the same domain.
How to fix it
Create a TXT record at _dmarc.yourdomain.com. A cautious starting point is v=DMARC1; p=none; rua=mailto:dmarc@yourdomain.com. Move to quarantine or reject only after you know legitimate mail passes alignment.
Check that your actual sending platform signs DKIM with an aligned domain or passes SPF with an aligned return-path domain. Then rerun the same placement test.