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 08203.biz
Found
Selector: default
(TXT on default._domainkey.08203.biz)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA154qsGil9MumYWAHVwDXeMAJrpsTD7O5RuEiNqGihEEYHZaU5Li3nEFBF7EKEPWIzlSRCD8wRMB0jPfH1znKg/4C34uMJvilxhlCUQyZQeb55c9QBdo2LoA9PwUR/9ctXK/khJC3+t5tdJ3CEYyXuP3f16XrGUU1H3hIOoNE5ob8L1HLJyF5Jn/DV0FdEmuVUqOE1FXfzl10VuWsC5LEAnLJzCeI8T8Se8roiLu2C4CgPXLXgrlk+SP0jdmiQdzNUAr+lLh3YxeH4u0ylhe2zJ+Q+C/1mEEr0NMJmOuHTpyLk9ArC1uwTLutthmolPKJoEPlSDiVNkLso4Tyk8EQlQIDAQAB;
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.