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 sisal.it
Found
Selector: selector1
(TXT on selector1._domainkey.sisal.it)
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCwdzQutHa/jlBukjAtTEKE5+zUqodnxlMJyEprMP8dtcvZdZYdEvK2SVfWN9pvRQ/VtRkHaVx3W2rso21JUAVpzm8z6J4zvmVfI1KHimtOf9px9Jm2ssx7K87d2n8Xv7oimE3AlZzLEI8bu7J3v4jVa4X/kmKQSyzb3NOQhMfJXQIDAQAB; n=1024,1450852308,1466663508
Selector: selector2
(TXT on selector2._domainkey.sisal.it)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsdQhWyjSu/deDJo9QefIQnHF9GJkrNvR4cbRlL0JQpsaDzu4aqDb3yEhpV60QhCOmTApIcXzY5aTPkZt3V7Kbx/buvfraApoJdoXoM6Kl+qGJuKhngamvPTKQ55YNSjHKsRqFS47UIgmwF3LhexeURrvt43BF6FctZMoQ69AIGfRrHqmP8l6U7JlmeKhjuPbqW5dRSVo9+e/g6sKV0mvj/bwsNM//AeuzjTR6NXV9otqHE5Yo767E9ygXLh0VXW9pLzHFEuZvxVTF2uYdmcFBaujZSYRifNbGC1Jtc5R3cinyCP4noHoHEnV5lFZ44//o603rTQ98mFtS1wK7VRr6QIDAQAB;
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.