Mail-Tester
Mail-Tester analyzes an email, its sending server and sending IP, then reports configuration checks and a spam score.
What Mail-Tester is
Mail-Tester analyzes an email, its sending server and sending IP, then reports configuration checks and a spam score. To run a test, users send a message to an address generated by the service and open the result page. The checks cover blocklists, SpamAssassin, SPF, DKIM, Sender-ID, DMARC, links and pictures. The free plan allows three tests within the last 24 hours. A test counts when a new message is sent, its result page is requested and the result is returned; reopening that result does not count again. Free results remain available for 7 days. Results from an account using its own prefix stay available for 30 days. Paid plans include an iframe and JSON API for integrating results into other software. Accounts add white-labeling, result-page CSS customization, test statistics, a 30-day test listing and pages without advertisements. The JSON API can return message information, authentication checks, body analysis, blacklist results and broken links. Mail-Tester cautions that a passing result does not ensure inbox placement.
Good
- Checks SPF, DKIM, DMARC and blocklists.
- Three free tests are available within 24 hours.
- Reopening a result does not count as another test.
- Paid plans include an iframe and JSON API.
- Account results remain available for 30 days.
Watch out
- Free results remain accessible for only 7 days.
- Free use is limited to three tests per 24 hours.
- Passing a test does not guarantee inbox placement.
- Paid options include one-time purchases and monthly plans.
Who it suits
Mail-Tester suits email marketers and software providers that want to check messages before sending or embed email tests in their products. Its API and iframe are aimed at integrating results into other software.
Verdict
Mail-Tester gives users a score and detailed checks after they send a message to a generated address. Its test limits and result-retention periods matter, and a passing score cannot promise inbox delivery.
Plans and prices
From Mail-Tester's own pricing page, checked 7 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| 10 Tests | $5, paid once | 10 tests · $0.5000 per test · One Time Payments |
| 20 Tests | $10, paid once | 20 tests · $0.5000 per test · One Time Payments |
| 50 Tests / Month | $10 a month | 50 tests/month · $0.2000 per test · price excl. VAT · Monthly |
| 500 Tests / Month | $25 a month | 500 tests/month · $0.0500 per test · price excl. VAT · Monthly |
| 50 Tests | $25, paid once | 50 tests · $0.5000 per test · One Time Payments |
| 500 Tests | $50, paid once | 500 tests · $0.1000 per test · One Time Payments |
| 1 000 Tests Most Popular | $80, paid once | 1 000 tests · $0.0800 per test · One Time Payments |
| 2 000 Tests / Month Most Popular | $80 a month | 2 000 tests/month · $0.0400 per test · price excl. VAT · Monthly |
| 5 000 Tests | $250, paid once | 5 000 tests · $0.0500 per test · One Time Payments |
| 7 500 Tests / Month | $250 a month | 7 500 tests/month · $0.0333 per test · price excl. VAT · Monthly |
The facts
Each one read from Mail-Tester's own pages, with the date it was checked.
What it does
- Account features
- An account enables white-labeling, result-page CSS customization, test statistics, a 30-day test listing, and test pages without advertisements.checked 7 Oct 2026
- Analysis
- The maker says it tests against blocklists, SpamAssassin, SPF, DKIM, Sender-ID, and DMARC, and also tests links and pictures.checked 7 Oct 2026
- API and embedding
- Paid plans include an iframe and JSON API to integrate Mail-Tester results into other software.checked 7 Oct 2026
- Audience
- The maker describes the micro-payment option for email marketing tools that let their customers test newsletters before sending them.checked 7 Oct 2026
- Developer details
- The JSON API can return test results including message information, SpamAssassin findings, authentication checks, email body analysis, blacklist results, and broken links.checked 7 Oct 2026
- How to test
- The service generates a random email address; send a message there and open the result page to receive a spam score.checked 7 Oct 2026
- Integrations and commission
- The micro-payment mode lets software providers embed tests and receive 40% of the amount users spend, excluding VAT.checked 7 Oct 2026
- Known limitation
- The maker cautions that passing Mail-Tester does not guarantee inbox placement because spam filters and user preferences differ.checked 7 Oct 2026
- Privacy
- The privacy notice says the service collects account and payment information and warns that information sent electronically may not be secure in transit.checked 7 Oct 2026
- Purpose
- Mail-Tester analyzes an email, its mail server, and sending IP, then reports what is configured properly and what is not.checked 7 Oct 2026
- Result retention
- Free results remain accessible for 7 days, while results from an account using its own prefix remain accessible for 30 days.checked 7 Oct 2026
- Support
- The FAQ directs users to contact the maker for API help and translation files.checked 7 Oct 2026
- Test counting
- A test is counted when a new email is sent, the result page is requested, and the result is successfully returned; reopening the same result does not count as another test.checked 7 Oct 2026
Money
- Free usage limit
- The service allows 3 free tests within the last 24 hours.checked 7 Oct 2026
The company
- Headquarters
- Dover, Delaware, USAchecked 28 Sep 2026
Alternatives to Mail-Tester
- 1
DMARC Report
Free planAndroidiOSWebAPI7.9From $25 a month - 2
Postmark
Free planWebAPI7.6Free plan - 3
Folderly
Free planWebAPI7.4Free plan - 4
GlockApps
Free planWebAPI7.4From $59 a month - 5
Unspam.email
Free planWebAPI7.4From $5 a month - 6
dmarcian
Free planWebAPIExtension7.3From $24 a month