Do the rules apply to small senders?

Bulk sender compliance check

Sending 5,000+ emails a day? Check the rules big inboxes now enforce.

Live lookupPlain English + technicalFree, no sign-up

Each rule is met or not met.
Some rules (unsubscribe, spam rate) can only be checked in your sent mail and Postmaster Tools.

The health check runs this and 30 more checks on a domain, then ranks what to fix.

Check a domain against the Gmail, Yahoo and Microsoft bulk sender rules: SPF, DKIM, DMARC, reporting and the ability to receive replies.

Every result comes in two styles: plain English for everyone, and the exact technical detail for engineers, with the raw JSON one click away.

SPF or DKIM and valid DNS apply to everyone; the full set applies over 5,000 messages a day.