DKIM checker
Find published DKIM keys and check their strength.
What this check does
Tries the selectors used by the major sending services, parses each key and reports its type and size.
- Keys under 60 common selectors
- RSA key size, revoked keys, testing flag
Questions
- My selector is not listed
- Selectors are chosen by the sender. Open a message you sent, view the headers and look for s= in the DKIM-Signature line, then look up that selector.