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 repubblica.it
Found
Selector: selector1
(TXT on selector1._domainkey.repubblica.it)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqXAdBIOgH4GfpUwu2l9tT3XgJlcQ4uS2qzF4XGC05/l23upwYfDJ63lUA9HBnTkEK2VQ8+2KlUJwPp+HK6BAInDh8daasoLIyKF7EZG8JItJ9If6AIsWDRKAQA+TCtZYYPW+Zwe7NCpTiu6HGfY7ZhP5fzFcfmJ/mD87GCNHek/1E9CtK1WADEJigjuVfnq0Td9FuOKP2u0IkiYi6GUNze86uUyJGlbsbmDmQAr7gOEOsV/Ym74f2ZLghQ+/cySbIXCOLleqL+3Pr69PtikYFSNk5Dx6x8D2PPS79NhMlkvAiD3XKKjq1TVJlJzOW+HMWty/XcNoaTOdRqL9O9z3QQIDAQAB;
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.