DKIMPROBLEM.comDKIM Record Analysis

Validation and Liability

This DKIM checker inspects selector DNS records and any CNAME target visible at lookup time. It can identify missing selector hosts, duplicate TXT records, CNAME/TXT conflicts, malformed tag syntax, and RSA key-size concerns.

DKIM validation also depends on the message that was actually signed, the selector used by the sending platform, the private key held by that platform, and which headers were included in the signature. Those message-level checks are outside the scope of a DNS-only lookup.

Before changing a DKIM selector, CNAME delegation, public key, or signing configuration, verify the selector currently used by your sending service and obtain approval from your DNS and email administrators.

Changing the wrong DKIM selector, removing an active key, or publishing a malformed key can cause signed mail to fail DKIM and may break DMARC alignment for legitimate messages.

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