No DKIM selector responded

Email authentication · Info severity

What it means

None of the common DKIM selector names checked for this domain (default, google, selector1, selector2, k1, mail) returned a public key.

Why it matters

This is a best-effort check, not a definitive one — DKIM selector names aren't published anywhere discoverable, so a real, correctly configured DKIM setup using an uncommon selector name would show up as "not found" here even though it's working fine. Treat this as a prompt to confirm DKIM directly with the email provider, not as proof it's missing.

How to fix it

Check with the email service actually used to send mail for this domain (Google Workspace, Microsoft 365, a transactional email provider) to confirm DKIM signing is enabled, and note the selector name it uses so it can be verified directly with dig txt <selector>._domainkey.<hostname>.