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 tube8.com
Found
Selector: default
(TXT on default._domainkey.tube8.com)
v=DKIM1; g=*; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDL1FkiOakh7HZAl1tJmkF1eqmviyboBsi1xkV+3vQQKlM8WCa7UBy0SvLNZAb1k0SlemjhIymfWh1c/VJyPjvpYw6btwLDPWI3cCEgRFBIEAx5izUM4lMVYAurevNxfIyb7OXxSfSNi3jmOAaYqK6uaug+Ph1JjjLEqfxm3Oj1rQIDAQAB
Selector: mail
(TXT on mail._domainkey.tube8.com)
v=DKIM1; g=*; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC0+P4/87v8zOsM3fdbqHm8retC+FD6MKmGjWQuPe47t9qoAkwmg8aUer/h98tazE4tATi0sXuk7zquBGCsDX5WrZjwlPjHGB8Mea+RQGQuseySr59bxtY1qasKU2EpguRa9M9n2fKdvovn5YczEGiiD3BOpHmN8Cbxz6j8HbXcRQIDAQAB
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.