Mail Records

MX, SPF, DKIM and DMARC in one view, with the mistakes that silently lose mail.

Enter a target

Enter the domain you send mail from. A missing SPF or DMARC record is the most common reason mail lands in spam.

Other tools

DNS LookupA, AAAA, CNAME, MX, TXT, NS, SOA and CAA records with their TTL values. DNS PropagationCompare what different resolvers answer for the same record. WHOISRegistrar, creation and expiry dates, status codes and nameservers. SSL CertificateValidity, hostname match, issuer and chain, read straight from the handshake. HTTP HeadersStatus code, redirect chain, response time and security headers. Port CheckIs a TCP port reachable from the outside? Tells closed apart from filtered. Blacklist CheckIs the IP listed on the major DNSBL zones mail servers consult? Reverse DNSPTR record, forward-confirmed check and the network the address belongs to.
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