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 mrstrade.biz
Found
Selector: google
(TXT on google._domainkey.mrstrade.biz)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAr267pUZYyPZ1iYHOz5XL9PEeKCwMorj6EIN8syGdPdnt5PIrIcONKQi9gxMIboLy4weWBRQ+Ot8Yk/Rl3/9S99JkPbEXGwE7cNqt2aH1Mv1EfLB9VIu6A+VfqvNJdLPtC8Ucj9Yv6bCbBf9I05tjf+F7SI5brzMR6l6LI0RmvpLXjeC//4ZW2Mvy5XRzemfa232QKuygU6rd097cs1yTskXT+d51t1F2XqWl5OvlyFxb9b4J1X2EVgEH9t26KAouEEsNIEibM3HHQpVCVLzNn32QwWFa0rQA/74em8X/5njgTn1xo5sz7BePn/B/MDdSBUMJg9i4pV6gbHwg1NBGvQIDAQAB
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.