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 zillow.com
Found
Selector: selector1
(TXT on selector1._domainkey.zillow.com)
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC1j0dZaH87p5wMM4lu8SGp1wLts/6sUDgEwmmgN5KL+WpSN+tT/qMXA1d5X3cmtlCMksseTplfLtwyBlVg/zGHz91D7vjrcHe/DlQybY1GjLwJv16y0uacM4jhJRHcsGx0MZuT+gkpTOS3DihZM4dSedI7V/RnjuDna07RxTtqowIDAQAB; n=1024,1452947952,1468672752
Selector: google
(TXT on google._domainkey.zillow.com)
v=DKIM1;k=rsa;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1WutreXKfs0Lde6WVNu88t6SB09Ar5zRZkMMNAbF4GXW9quIFGRGyN5Kvvto4UbSK01VbngTvBO2LMnfH1qPAA4l/7HwdXECosN7QwmXLNwDTWigJGr2NQRsfAZQPPvqLDNPaCMyZ5S9nxB3u8glDFL5ojJo7AoPQswGQZS1vwjOMLXl+eS1pFABHzuUJl8+nYBVr98H4T4fjjRNw8FM9wj+8xJx1Jep6zJRCIc29JT8uU6KAWz5dWuhCy0xce+A7Be8j6IXJRsl1sADnOFqxh4uazo72YHIqjHJWcCSqnPg9HK52GnFKOFxwBfEHYAcAvlSrbS2efllyWY2jduBSwIDAQAB
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.