Email DNS & deliverability checker

Enter a domain to audit SPF, DKIM, DMARC, MX, DNS health, and blocklist status.

What we check

  • SPF — TXT records containing v=spf1
  • DMARC — TXT at _dmarc.yourdomain.com
  • DKIM — TXT at common selector._domainkey hosts
  • MX — Mail exchanger records and priority
  • NS — Authoritative nameservers
  • DNSBLs — 11 IP blocklists (Spamhaus ZEN/SBL/XBL, SpamCop, SORBS, Barracuda, UCEPROTECT, CBL, PSBL) for each MX IPv4
  • URIBLs — multi.surbl.org & multi.uribl.com (when resolvers allow; public DNS often returns “query refused”, not a listing)