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 astradesign.biz
Found
Selector: default
(TXT on default._domainkey.astradesign.biz)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAy36a5sesmL/PzJiKPbKUuvBjc7XjksNkUJCqQAhfRBvLEYKWhMlr0D80P2S8/GVIwwT/a3HKThp1CwTOU3iIG8AqyiSGAhW0TF6lw4KpkgoUdUgAUSAV/v84uOpJpIzTkrbx0U30NvSKHlsIE3pvaFvXA6DEbQPKpi/AZ9yTcBaqRcXrL7qmVqyLD54xU4f56WVLpz1xHvEH1Kt3a/c+4na4SrGe+lnRwaUxLWY8Y/nWZo/JNsl0Hnu3GiN594ZR5PzBs26RwL/O7KXTrKPF4boVrg2bSfYg0OL5HRPfg3+p/AAeA53uczr50pbkjXDQpU0h7q0Q7eqg/ebocO6oxwIDAQAB;
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.