DKIM record lookup.

Pull the signing key for a domain and selector, or scan common selectors.

Price
Free, no signup
Category
DNS and authentication

Leave as default, or use Auto-scan if you are not sure.

DKIM record lookupWaiting for input

DKIM key details appear here.

Enter a domain and selector.

What DKIM does.

DKIM (DomainKeys Identified Mail) adds a digital signature to your mail. The receiving server uses the public key at selector._domainkey.example.com to check that the message came from you and was not changed.

What this tool checks.

  • Whether the selector record exists
  • Key type, size, and algorithm
  • The public key text

How to read the results.

  • Use Auto-scan if you do not know the selector.
  • Prefer 2048-bit keys when your provider supports them.
  • Keep the public key intact, without extra line breaks.

Common questions.

What is a DKIM selector?
A selector is the label used to find the DKIM TXT record, like default or selector1.
What key size should DKIM use?
Use 2048 bit keys when possible. 1024 bit still works but is weaker.
Why is my DKIM record missing?
Most issues come from the wrong selector or a TXT record not published at selector._domainkey.
Does DKIM improve deliverability?
Yes. DKIM helps receivers verify message integrity and supports DMARC alignment.

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