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 freeoyun.com
Found
Selector: default
(TXT on default._domainkey.freeoyun.com)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAtACJP4cQ/ugfP5wWSn43nRXNHLfQBobs8V5HDi9/mLgtFoQoAy3zTQABz7ijTB5gZvhNvhkH6e732WmA/nX/TLN7i3veKvXIIFfnKzy9cwcNNIK8aimCL8cBt1N9TgrA3Q9QZbgYjdYl6+cxIP414G58Y2HUdR7+Hbzns+nNW01WC2ZDmjX1wDa3P15BoFos77248jYRq27+6t5sdCBnBC9c8xMxdhJy0nNwkV6nA5D7lLfoms7y97tID6DvW7XuZ0lRvxHX+T4TMX8gkHwObiZq0vX9XKgO0S6VJsE0xa1V1igp7QNt52lJ8Y1xyozU0xX11BOfAs+0LN8gRhMZHwIDAQAB;
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.