Free tools · no signup
Check how a domain's email is set up, who can send as it, and whether anything is holding its mail back. Every tool is free and needs no account. A test where you send one real email and get it scored is opening soon.
SPF, DKIM, DMARC, MX and MTA-STS in one pass, with a score and the fix for anything that fails.
/tools/email-checker
ReputationOpening soon→Send a real email to a test address and get a score out of 10, with every fix ranked by impact.
/tools/email-tester
Reputation→Authentication, blocklists, routing and domain age combined into one A–F grade.
/tools/email-health-score
Authentication→Unrolls every include and counts lookups against the 10-lookup limit, with a corrected record.
/tools/spf-checker
Authentication→Every DMARC tag explained, report destinations verified, and the next step toward p=reject.
/tools/dmarc-checker
Authentication→A straight verdict on whether a domain's From address can be forged, and how to close the gap.
/tools/spoofing-checker
Reputation→An IP, or a domain plus its mail servers, checked against public DNS blocklists.
/tools/blocklist-checker
DNS & domains→Mailbox host and every sending service behind a domain, read from MX, SPF and DKIM.
/tools/who-sends-email
Authentication→Record, DMARC enforcement, SVG Tiny PS logo and VMC/CMC certificate, checked together.
/tools/bimi-checker
DNS & domains→A, AAAA, MX, TXT, NS, CNAME and CAA side by side, and who hosts the zone.
/tools/dns-lookup
DNS & domains→Registration date, expiry and registrar from official RDAP data, and what age means for mail.
/tools/domain-age-checker
Content→Highlights trigger phrases, shouting and risky links in your copy, with the reason for each.
/tools/spam-words-checker
Not sure where to start?
The email health score runs the most important checks together and grades the domain A to F, with the fix for anything holding it back.
Every domain you run in one inbox, from $3 a mailbox. 14 days free, no card.