Email Tools
Free, no-signup tools for testing and diagnosing email deliverability. Every lookup runs server-side, in real time, against real DNS — see each tool’s page for exactly what it does and does not check.
Email Tester
Send a real test email to a temporary address and get a plain-language deliverability report.
Email Verifier
Check an address’s syntax, whether its domain can receive mail, and whether it’s a known disposable domain.
MX Lookup
Look up a domain’s Mail Exchange records, sorted by priority.
SPF Checker
Look up and parse a domain’s SPF record — which senders it authorizes.
DKIM Checker
Look up a domain’s DKIM public key by selector.
DMARC Checker
Look up a domain’s DMARC policy and see how it handles authentication failures.