See exactly why Gmail is rejecting your mail.
Run a domain audit in about 10 seconds. Mirrors Google's Postmaster Tools v2 Pass/Fail dashboard: the same checks Gmail uses on bulk senders.
Frequently asked questions
What is a Postmaster checker?
A Postmaster checker reviews the authentication and bulk-sender requirements Google surfaces in Postmaster Tools v2 — SPF, DKIM, DMARC, and related setup — and returns Pass, Needs Work, or Fail for each item.
Do I need a Google Postmaster Tools account to use this?
No. This page queries your public DNS and related signals directly. You do not need to verify the domain inside Google Postmaster Tools to see the audit result.
How is this different from the full domain audit?
This checker focuses on the Postmaster v2 Pass/Fail surface. The full audit widens the same domain check across MX, SPF, DKIM, DMARC, MTA-STS, TLS-RPT, BIMI, and related reputation signals.
What should I fix first if the audit fails?
Start with authentication: a single valid SPF record, working DKIM selectors, and a DMARC policy that matches how you actually send. Then tighten DMARC after you confirm legitimate senders are aligned.