Email Health Checker
Enter any domain to check its SPF, DKIM, and DMARC email authentication in real time. Free, no account needed.
What is an email health check?
An email health check scans your domain for the things that decide whether your mail reaches the inbox: SPF, DKIM and DMARC configuration, MX and reverse DNS, MTA-STS, and whether your domain or IP appears on major blocklists.
Why it matters
Most deliverability problems trace back to a misconfiguration you cannot see from your own inbox. A health check surfaces them in one place so you know exactly what to fix before your next send.
What to do with the results
Fix any failing authentication first (SPF, DKIM, DMARC), clear blocklist listings, and verify the lists you send to. Monitor DNS and reputation over time, since deliverability can drift without warning.
Frequently asked questions
Is the email health check free?
Yes — you can check your domain’s deliverability health for free.
What does it check?
SPF, DKIM and DMARC records, MX and reverse DNS, MTA-STS, and major domain/IP blocklists — the core signals mailbox providers use to filter mail.
Why are my emails going to spam even though everything passes?
Authentication is necessary but not sufficient. Low sender reputation, spammy content, poor list hygiene, or a cold IP can still cause spam placement — monitoring reputation, DMARC reports, and content helps you diagnose it.
How often should I check?
Before any major campaign and after any DNS, IP, or ESP change. Deliverability can drift without warning, so periodic checks are wise.