Domain security checker
DMARC, SPF, DKIM and an overall A–F grade for any domain, from live DNS.
Check a domain →Free tools
Check a domain, then fix what it finds.
DMARC, SPF and DKIM for any domain, graded A to F — plus the generators that build the records. No account needed.
Free · no account needed · 50 checks a day
Every free tool
DMARC generator
Build a complete DMARC record — every parameter explained in plain English.
Build DMARC record →SPF generator
Build a valid SPF record without exceeding the 10-lookup limit that breaks delivery.
Build SPF record →