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Mail configuration check

Check the MX, SPF and DMARC records of a domain and find common mistakes such as multiple SPF records, +all or a missing DMARC policy.

About this check

SPF lists which servers may send mail for a domain, DMARC tells receivers what to do with mail that fails SPF or DKIM, and MX records say where mail for the domain is delivered. All three are public DNS records.

Other tools: Geofeed checker, DNS record lookup, DNS propagation check, IPv6 readiness test, Email header analyzer, DNS leak test, Prefix tools, TLS certificate check, HTTP header check, DNS blocklist check, Subnet calculator.