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 skybook.ag
Found
Selector: default
(TXT on default._domainkey.skybook.ag)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxGP0gIhkxIN2Iob3ZRapPViv+IaRrVvcKmlllSP+AQMY2y52yJ8HRuDQ6XOoplE7kR2n8tlVcFnpgzZB5se9rmi9qe8EacYiqlzF/jO/yVPIOhslZH1k/zSDOdzNrlsqPf+UfV4FsDG7G7bqaBomIGyIdaY8a59uRlFkky++PFzRudtecK+sZC7l+aQcnCWirVwd/ajlLg/Q5lNqsPzbRmii1DUb5ucB47x6TSBQgi3pbZfWld8HS67VbATSvvVybiGqmILPVGTW/p9JyBH1Vxq3a6xRH6tiL5I3E6AtCKQT4zy0VmJN0NB1C17BD2oapOK8NSAm31rz6fu0LMZfeQIDAQAB;
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.