Analyze Email Signatures
Examine the actual cryptographic signature attached to your emails. We decode the header to extract the signing domain, selector, algorithm, and list exactly which email components were protected.
DKIM Diagnostic Tools
Testing your DNS is only half the battle. Paste your raw DKIM-Signature header to decode cryptographic hashes, audit algorithms (rsa-sha256 vs rsa-sha1), verify protected headers (h=), and seamlessly handle RFC 5322 line folding.
Examine the actual cryptographic signature attached to your emails. We decode the header to extract the signing domain, selector, algorithm, and list exactly which email components were protected.
Testing your DNS record is only half the battle. Your mail server must successfully construct and attach a valid `DKIM-Signature` header to every outgoing email for authentication to pass.
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