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 rapidmsg.net
Found
Selector: selector1
(TXT on selector1._domainkey.rapidmsg.net)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA2dzZwgzpXmJ18OQQbDa33rFqbS7Pf2kSdyumrDKMy7nLZlYiCBT+i8HSb+nA0c5FzgcbKg/R6dTg2SRZO9BchDRCEzCm9JjKKDO14lGkqDJ/LY08ZDxS86vyr59T3zDsl0HR0Wqw1QdHH/lh3O56oOhcmfmqq/FQQQFDcCpnrWrNi+iJGmA7m1rGunrbX4SNbJy6/f9h9YPD2S+1zYcdD7MT6Z06vOZomypZuQfCl/Q5mSRFpmBx2NMY+CwWYpANswo2gZN+brpnAKzWvGiqdMxluUy+42kY/JOhstweEHy+/9E4cA8oZUFwK0Wr74nd4nFob2Kcr1WEQTkF/I1h/QIDAQAB;
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.