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 dostres.net
Found
Selector: default
(TXT on default._domainkey.dostres.net)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAz6+qNBTuDZfxd6GE/3X0DPyRi8OIh6E+Vb1kLMNhuzLNXQqoufjjKz8pjSAKESXYHLlZEx2vFddHl2OU/AHPn5XXsc2CB+9jelkA1gKgEEa8OlYUda+wLmLuvhhiqKDVHJQD1jIl+oslWXKN9bMzZ16HiuGLU6EgmCpOxi3lcPB5142vd0Wyi7vtgf1EkqHYlXYqtOsppr/ied8KnWP1RlbVNyxC9XKIX/+C7WfcagYE9pj7bUiGMs/ag9DEMHRzTIX+RpzZhPX9RKrSaYtMfhoVeZGvg8ptGkhRiYaiOMGiIeYXgFX+0QTKxVyuLiGqdrtntPcFEYrAh70T1ENnNQIDAQAB;
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.