Glossary Deliverability
What is DMARC? Email authentication policy
Also called Domain-based Message Authentication, Reporting and Conformance
DMARC (Domain-based Message Authentication, Reporting and Conformance) is a DNS policy that tells receiving servers what to do with email that fails SPF and DKIM alignment for your domain, and where to send reports about it.
DMARC is described in RFC 7489. A record such as v=DMARC1; p=none; rua=mailto:dmarc@yourdomain.com sits at _dmarc.yourdomain.com. The policy can be none (monitor only), quarantine (send to spam) or reject.
An email passes DMARC when SPF or DKIM passes and the domain it checked matches the From address. Most teams start at p=none, read the reports, then tighten the policy.
Why it matters
- Google and Yahoo require DMARC for bulk senders since 2024.
- It stops others from sending convincing fake email as your domain.
- The reports show every service sending as you, which often surfaces forgotten tools.
How Reach Crew handles it
Because Reach Crew sends from your own Google mailbox, your emails pass DMARC the same way your everyday Gmail does, as long as your domain's SPF or DKIM is set up for Google. Reach Crew does not change your DNS or your DMARC policy.
Related terms
- SPF. SPF (Sender Policy Framework) is a DNS TXT record that lists the mail servers allowed to send email for a...
- DKIM. DKIM (DomainKeys Identified Mail) is an email authentication method that adds a cryptographic signature to...
- Email deliverability. Email deliverability is the share of the emails you send that land in the recipient's inbox, rather than in...
- Guide: Email warm-up and sending limits for a new mailbox