About
Free Mail Tester is a web-based email deliverability checker that generates a unique test address, accepts a message sent from a real mail client or campaign tool, and returns a 0 - 100 score with analysis of inbox placement and spam signals. The service checks SPF, DKIM, DMARC alignment, Rspamd spam scoring, reverse DNS, DNS records, blacklist status, content quality, link validity, TLS encryption, technical headers, and HELO/EHLO matching.
The free offering is unlimited: there is no signup requirement, no credit card, and no monthly cap on the number of tests you can run.
- Unlimited free mail tests
- 0 - 100 deliverability score
- 23+ blacklist lookups
- SPF, DKIM, DMARC checks
- Rspamd spam analysis
- Shareable public report URL
- Embeddable score badge
Free Tier Value
The mail-tester tool at this URL is free and unlimited, with no signup and no credit card. SendBridge, the parent product, sells separate paid email-validation credit packs elsewhere, but those do not gate this deliverability test.
What's included in the free tier
Verified
- Unlimited free email deliverability tests, no signup required, no credit card, no monthly cap.
Common questions
Is Free Mail Tester free forever?
Yes. Free Mail Tester is free forever, with no time limit and no usage threshold that forces a paid plan.
Does Free Mail Tester require a credit card?
No. You can start on Free Mail Tester's free tier without entering card details.
What is Free Mail Tester's free tier worth?
Free Mail Tester's free tier has no dollar cap - it's unlimited, with no usage threshold that forces a paid plan. That maps to an FTV score of 100/100. The FTV score is explained at freetier.co/ftv.
