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 alzhi.org
Found
Selector: default
(TXT on default._domainkey.alzhi.org)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwQpOlV7/qOscfSPijfJy0RivqYkJIqJpF5js5Ybn2QxhuPrFbpAn22+tm1A3J6gOsT9HEY8LQ0suEo2H3G/RR0QaApc7XkR23FoJrvsO2A7Gbv9QcXU9QVbWzVTMAqdR2Dhf8p0pYpgyL1XdOfetWwnxqi+DwugeVsHueOCMWjk+4YG7Xz6cVSDO3ee6AlvaiqDGVav5TN4xBHYHCPI8DVhs3/w3LDAewL7GN9zvJLG/0TNv581hpdr5mXOq+sDeRUsMzoD176IvBvgwHWvDOm3Me3jDLyFh8lg+ltGPVDS5oFAasO43DgjSNvuufhij8OJzz9BCLUXFUOhyRADC2QIDAQAB;
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.