Deliverability Analyzer — free

Check any domain's mail setup: MX provider, SPF, DMARC. No signup, nothing stored.

Need to verify actual mailboxes? This tool checks a domain's DNS setup. To confirm whether a specific email address exists and is deliverable, use the free verifier on mailtester.ninja →

Built & updated automatically by MailTester Ninja — the email verifier that stores nothing. DNS-only, aggregate data, no personal information. · Index · Email checker · Tools · Guides · JSON API · ✓ Verify emails →