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 ifortuna.cz
Found
Selector: default
(TXT on default._domainkey.ifortuna.cz)
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCnXChpmuuOEnF5No6pwFvNdSJnND1Y2xXnhtl62ud0uUMGPMT3d6DmO90385QiLsTe0jeaGYeQ/rXGfMqj0XLh5obpmLyjafS6nzeFNawjKOedzFTYzmJyjFySa3q3jpFDg+VUBv7YGQOWy4i1hjl07kTLiwJbRSgC9EAHiiQpfQIDAQAB
Selector: selector2
(TXT on selector2._domainkey.ifortuna.cz)
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDJ6HTHN73Ix/zWxoZbNpJw1ss9Cm0wpWMqadfH9ac+wWTVDFAkgGxaohqXIEdV1rhoPov3gg8IBg8L+lONvdFeKRmOu2/ktBhhcXXYUG9MT7uChVAN+3kwE4DgVGqdT1331wPdA3/pR4Ww8p1WK9RsRQfXF9MvW0zSRlmyCQt8hQIDAQAB;
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.