Email Deliverability Checker
Check any sending domain in seconds: SPF, DMARC (with policy), MX, and three blacklist verdicts. Spamhaus DBL, SURBL, and URIBL.
Free · no signup · last reviewed August 29, 2026
Methodology & honest limits
How it works: we query your domain against three independent DNS blacklists. Spamhaus DBL, SURBL, and URIBL. Exactly the way mail filters do, and read your SPF, DMARC, and MX records straight from DNS. Nothing is stored; the check runs live.
Honest limits: these are three major lists, not all of them (dozens exist, most niche). A “clean” result here is strong but not a guarantee of inbox placement. Content, volume patterns, and sender history matter too. A DMARC policy of p=none passes the presence check but only monitors; quarantine or reject actually protect. Limit: 20 checks per day.
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This is the work. Want it done?
Everything here is free to use yourself. That’s the point. If you’d rather a senior marketer just handle it, in your accounts and your name: 20-minute call, no pitch deck.