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 biobiochile.cl
Found
Selector: selector1
(TXT on selector1._domainkey.biobiochile.cl)
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCbvF+4tFtfWbsRuVTZEu3P9vzYPAGtsagjfMUs+d1l01mBkiXxvAwELvRVGhxhCFAI+01rK4t6MP+nRGXQ6Kp+2sTA+nnXlacHmKX11dIO6UQw+fX1nURfcREZFJkzz78NWTi8VqRXWFTjkF7+7NDMhTz7vgZX2u5s1jebrZY8UQIDAQAB; n=1024,1448996473,1464807673
Selector: selector2
(TXT on selector2._domainkey.biobiochile.cl)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxq7Zl+6h+FDizgCzPZcUI+ZBoy2cfCDVu8GqTBxJTwZGMN2y/pbHmm+qy8BJgAelXYKWHDDU8aGoR0ti7Sp0oDpeiob+TusY2G/3Oz2Of8ZlU5j19sb6NDN7+6q6hqk6c6qROGjjH8OlDmdnPCNdlOjlaN9VtUwdtjaClH2ekMk07+1SNaZ6L4sg0y7idqEN2i8c/R6Wftf+oR/pU9pOxuz7N8iEmrfYw1kXcdtF6IwJK2O0hsSSpaV4g/xyVaaNsaWlF0gjTfMJUlKc4piQ/hVw7GEeIBnkaBKlW1l2yK3kX0SXusOdtqIyAI73cRxZwExCseiQmtccRjS3OCghAQIDAQAB;
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.