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 researchgate.net
Found
Selector: google
(TXT on google._domainkey.researchgate.net)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4eO8JelQ6ORVDtmQHJZRk8KlgWdjD2k+sViEavcdQJZNbOrkfH3YDg3n7C4S0VseAXnWLl1U+LWzfQ8p1g63sj3AnqB8qiudf7ifpg4Lhz9lRQMrHwTLcHk7pdCeWl33TVKoWcQ4vbP3f9RBwwZyuS0Ony6QFQy+XfKyilO9sYRfG6/gQWFcxPLZIpxWUBcFPkZslGmwvd+I8CQpoGK1E6X02DX6eckzozDA0nUueEqQmAUjuPygKJhYXse7W56dSZlCLs4A/hpfANgWH80C5c74sCisG8pVtLiCjLb/rcDIhRtJOVbaJdyyU0aq6B0zij8+ff0dmGtV0ZAWav7jzwIDAQAB
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.