DKIM Record Checker
DKIM signs outgoing emails. Receivers verify the signature using a public key in DNS.
DKIM lives on <selector>._domainkey.<domain>. If selector is empty, we try common ones.
Result for lifehacker.com
Found
Selector: google
(TXT on google._domainkey.lifehacker.com)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAld7Ybhw1BeVccZEyghtbMVxasn8R6x2t6JVbp8b0FW+VsT0xe46m6S/7Icveoqu9zfaV3uUyfhyI7pDaRqJ37EwZX3J91DonEI3V8ey4bOohIYOTfglnMCmp0DXEHAmhSCf3mVw4Xpm9bRBdxzxeSIgzghj0lYwOiwpsQsFwNVbsEGbrVgHEQz4+LY2SBYbsh+j1/R0QX5fLXox+zRUtM/uckfIfAAykxzr0FwEkypu93MsI7+XTrXBMHgTmqGUq1tm9Xu4zit8FUtwTazCeKaV3+tq1KZ+AtsqXIeky1LCLP731lnHtJb6zzgqlAZeH5zK30V/3ChxvIkZZ/uuz3wIDAQAB
FAQ
Why does DKIM require a selector?
Selectors allow rotating keys and running multiple keys per domain.
Where is DKIM published?
TXT on <selector>._domainkey.<domain>.
DKIM record exists but emails still fail DKIM?
Signing may be disabled or the selector used in email differs from DNS.
Do I need DKIM if I have SPF?
Yes, many providers use both for best deliverability and DMARC alignment.
Can I have multiple DKIM selectors?
Yes, that is common for key rotation or multiple senders.
What is DKIM?
DKIM (DomainKeys Identified Mail) adds a cryptographic signature to outgoing emails. DNS stores a public key that allows receivers to verify authenticity.
Example
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0B...
Common mistakes
- Wrong selector (the record exists but under a different selector).
- Key is split incorrectly across multiple TXT chunks (some DNS UIs break it).
- Publishing DKIM but not enabling signing on the mail provider.