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 bithubtrade.biz
Found
Selector: default
(TXT on default._domainkey.bithubtrade.biz)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA47pb0mvl8ijoJyvdspHW/xL9OSAasfD/5aPOqzG/WpqR45Rv/Jq0A25REQAbcgs3QlmFqfmPim7r8/F42+ACTBou4A7D8A7bH0FhqeHnwJUYT5ZOaYEIPqJuAGeAn+av8MQ0gjijG0CuvChuv7AsVC2uoxlqyoWWZmGZYijLfgY+RmDvqSqw2YT+eY+X5C7qrwZ2NaYJKL3vJUQYU/+vuVyOvXv8nzUj3cYNc11HyuWte9ml51XwEKdMvZeDIYlh8v9SN88eedf71GnIE9tdrf1i2miYJvOHIOozpKB/O6OAKA/81u+otXv+4+gJ4aBaA/lgbjV3XiqnOzMn72ZuBQIDAQAB;
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.