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Mail-Tester
Dover, Delaware, USA
What it is
Mail-Tester checks an email, its mail server, and its sending IP, then presents configuration findings and a spam score. To run a check, send a message to the random address generated by the service and open the result page. Its analysis covers blocklists, SpamAssassin, SPF, DKIM, Sender-ID, DMARC, links, and pictures. The free plan allows three tests within the last 24 hours. A test counts after a new email is sent, the result page is requested, and a result is returned; reopening the same result does not count again. Free results remain accessible for 7 days. Results from an account using its own prefix remain accessible for 30 days. Paid plans include an iframe and JSON API for bringing results into other software. Account features include white-labeling, result-page CSS customization, test statistics, a 30-day test listing, and pages without advertisements. One-time test bundles and monthly plans are available, including 10 tests for $5, paid once and 50 tests per month for $10 a month. Passing a check does not guarantee inbox placement, since filtering and user preferences vary.
For and against
For
- Free plan allows three tests within 24 hours
- Checks SPF, DKIM, DMARC, and blocklists
- Paid plans include an iframe and JSON API
- Account results can remain accessible for 30 days
Against
- Free results remain accessible for only 7 days
- Passing does not guarantee inbox placement
- Inbox placement monitoring is not offered
The verdict
Mail-Tester provides a score and configuration checks through an email-and-result-page workflow. Its findings can help identify issues, but they do not assure inbox placement.
Who it suits
Mail-Tester suits people who want to check message authentication, blocklists, links, and other email configuration details before sending. Its API and iframe options may suit software providers embedding email checks for their customers.
Plans and prices
10 Tests
10 tests · $0.5000 per test
Read 7 Oct 2026 · mail-tester.com
20 Tests
20 tests · $0.5000 per test
Read 7 Oct 2026 · mail-tester.com
50 Tests / Month
50 tests/month · $0.2000 per test · price excl. VAT
Read 7 Oct 2026 · mail-tester.com
500 Tests / Month
500 tests/month · $0.0500 per test · price excl. VAT
Read 7 Oct 2026 · mail-tester.com
50 Tests
50 tests · $0.5000 per test
Read 7 Oct 2026 · mail-tester.com
500 Tests
500 tests · $0.1000 per test
Read 7 Oct 2026 · mail-tester.com
1 000 Tests Most Popular
1 000 tests · $0.0800 per test
Read 7 Oct 2026 · mail-tester.com
2 000 Tests / Month Most Popular
2 000 tests/month · $0.0400 per test · price excl. VAT
Read 7 Oct 2026 · mail-tester.com
5 000 Tests
5 000 tests · $0.0500 per test
Read 7 Oct 2026 · mail-tester.com
On the record
- Account features
- An account enables white-labeling, result-page CSS customization, test statistics, a 30-day test listing, and test pages without advertisements.mail-tester.com · read 7 Oct 2026
- Analysis
- The maker says it tests against blocklists, SpamAssassin, SPF, DKIM, Sender-ID, and DMARC, and also tests links and pictures.mail-tester.com · read 7 Oct 2026
- API and embedding
- Paid plans include an iframe and JSON API to integrate Mail-Tester results into other software.mail-tester.com · read 7 Oct 2026
- Audience
- The maker describes the micro-payment option for email marketing tools that let their customers test newsletters before sending them.mail-tester.com · read 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.mail-tester.com · read 7 Oct 2026
- Free usage limit
- The service allows 3 free tests within the last 24 hours.mail-tester.com · read 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.mail-tester.com · read 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.mail-tester.com · read 7 Oct 2026
- Known limitation
- The maker cautions that passing Mail-Tester does not guarantee inbox placement because spam filters and user preferences differ.mail-tester.com · read 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.mail-tester.com · read 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.mail-tester.com · read 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.mail-tester.com · read 7 Oct 2026
- Support
- The FAQ directs users to contact the maker for API help and translation files.mail-tester.com · read 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.mail-tester.com · read 7 Oct 2026
