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 izuhara-hospital.com
Found
Selector: default
(TXT on default._domainkey.izuhara-hospital.com)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA5+w78SjA3/McVvwsvqh3TZw9ikw+tn3nFWyhJaJ+BfC5YDnuaKhEcqeByiKb3RCS26yBV1W9Ska5oyEcXlXmH1tBSbVXdPq7PzTbdLjhbs/tdr5b7vT9dbff0RQ3woGb54xswA0CkafY8cKkSUVpUY7p3dyjmFLhGSlqH4Bg1ESrpB8pZVo3pciTkUxpykBlTazcwvQHbyCrTh/95lWA3JAGCQjsDbY1uY8N1zQyPHnMYwR8N5LYF23+TEVBmwA+dHJ6eJBxaRlL7gtRvNSr+kdPYG6+gDagxPQoNn/oLtWvn4h90rG12A5/WWTpIFKccaAO0A76RJ8Yrp4vy6DCJQIDAQAB
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.