Free email deliverability tools
Check any domain’s email setup — provider, SPF, DKIM, DMARC, MX and more. All free, no signup. When you’re ready to verify a whole list (Microsoft 365 included), Engage takes it from there.
Domain Email Health Check
One-click audit — MX, SPF, DKIM, DMARC graded A–F.
Is a Domain on Microsoft 365?
Detect the mail provider (M365, Google, gateway) from DNS.
MX Record Lookup
List a domain’s mail servers and who runs them.
SPF Record Checker
Check the SPF record + policy (-all / ~all / +all).
DKIM Record Checker
Scan common selectors for a published DKIM key.
DMARC Record Checker
Check the DMARC policy (Gmail/Yahoo now require it).
Disposable Email Checker
Is it a throwaway/temp inbox? Check any address.
Bounce Risk Analyzer
Paste a list — flag invalid, disposable, role & free-provider risks.
Email Permutator
Name + domain → every common email format, ready to verify.
Choosing a finder or verifier? See how Engage compares →