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 doctor-kc.com
Found
Selector: default
(TXT on default._domainkey.doctor-kc.com)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyqcPTE1uuFCyRRk3P1s56d99fzL9fzP+PY1KPNZkOVJw2KGRy/zG9peaa5Uey42y6Ktce3ZGWczNiIhQj8VZ3WTG14QdJ5If7w7cIlfvoqE+wBcMvQsix32X/xOqbWoyQoRDEOHD6uky/VcPz6Y6aA5xW+Pqb6GPlYGNyU9G4jafBz30mx7zJa2mAIkZ42jPEi5PpfqLyZZHBp1oy1QknA3RF5McPgoSkKdTCEwVAzLvGZhPX8ZI/I5IC8g1sKZFRpZBQziCuV0lv21xeV8cZtRuWD2SUXID3hklHk22CCzI1rbeyh32sOJ3tCkweD7DJ8/k5/FzYKfXUf0wkzZCzQIDAQAB
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.