Freedom251 › Email Deliverability Software
Mail-Tester
What Mail-Tester is
Mail-Tester analyzes an email, its mail server, and sending IP, then reports configuration checks and a spam score. To use it, send a message to an address generated by the service and open the result page. Its checks include blocklists, SpamAssassin, SPF, DKIM, Sender-ID, DMARC, links, and pictures. The free plan allows three tests within the last 24 hours. A test is counted when a new message is sent, the result page is requested, and the result is returned; reopening the same result does not count again. Free results are accessible for 7 days, while results from an account using its own prefix remain accessible for 30 days. Paid plans include an iframe and JSON API for integrating results into other software. Account features include white-labeling, CSS customization for result pages, test statistics, a 30-day test listing, and pages without advertisements. Paid options include one-time test bundles and monthly allowances, with listed prices such as $5, paid once and $10 a month. Passing a test does not guarantee inbox placement because filtering and user preferences vary.
Who it suits
It suits individuals or email teams who want to check message and sending-domain configuration before sending. Its API and embedding options may suit email marketing tools that want to offer tests to their customers.
What it does well
- Free plan includes three tests per 24 hours.
- Checks authentication settings and blocklists.
- Paid plans provide iframe and JSON API access.
- Reopening a result does not count as another test.
What to know first
- Free results remain available for 7 days.
- Passing does not guarantee inbox placement.
- No inbox placement monitoring is listed.
Limits
The free plan allows 3 tests within the last 24 hours, and free results remain accessible for 7 days. Paid plans include one-time bundles and monthly quotas, starting at $10 a month for 50 tests/month; monthly prices are excl. VAT.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| 50 Tests / Month | Monthly · 50 tests/month · $0.2000 per test · price excl. VAT | $10 a month |
| 20 Tests | One Time Payments · 20 tests · $0.5000 per test | $10, paid once |
| 50 Tests | One Time Payments · 50 tests · $0.5000 per test | $25, paid once |
| 500 Tests / Month | Monthly · 500 tests/month · $0.0500 per test · price excl. VAT | $25 a month |
| 7 500 Tests / Month | Monthly · 7 500 tests/month · $0.0333 per test · price excl. VAT | $250 a month |
| 5 000 Tests | One Time Payments · 5 000 tests · $0.0500 per test | $250, paid once |
| 10 Tests | One Time Payments · 10 tests · $0.5000 per test | $5, paid once |
| 500 Tests | One Time Payments · 500 tests · $0.1000 per test | $50, paid once |
The first 8 of 10 plans, as mail-tester.com lists them, read 7 Oct 2026. The maker's own page has the final word. Every plan
Getting started
- Open https://mail-tester.com/.
- Use the generated random email address as the recipient for a test message.
- Open the result page to receive the spam score and checks.
- Choose a free test or a paid plan for more tests and API or iframe access.
Verdict
Mail-Tester offers a straightforward email check with a free allowance and paid integration options. Its score is not a promise of inbox delivery, and results have limited retention periods.
Questions
Is Mail-Tester free?
Yes. The free plan allows 3 tests within the last 24 hours. Paid plans include one-time test bundles and monthly allowances.
How much do paid plans cost?
Plans include 10 Tests for $5, paid once and 50 Tests / Month for $10 a month. Other listed options include one-time bundles and monthly plans up to $250 a month.
Which platforms does Mail-Tester support?
The listed platforms are web and API.
What can the JSON API return?
It can return message information, SpamAssassin findings, authentication checks, email body analysis, blacklist results, and broken links.
Does a passing result guarantee inbox placement?
No. Mail-Tester cautions that spam filters and user preferences differ, so passing does not guarantee inbox placement.
Can software providers offer tests to their customers?
Yes. The micro-payment mode lets software providers embed tests and receive 40% of the amount users spend, excluding VAT.
Facts from Mail-Tester's own pages
- 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, 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, 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, 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, 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, 7 Oct 2026
- Free usage limit
- The service allows 3 free tests within the last 24 hours. · mail-tester.com, 7 Oct 2026
- Headquarters
- Dover, Delaware, USA · mail-tester.com, 28 Sept 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, 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, 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, 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, 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, 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, 7 Oct 2026
- Support
- The FAQ directs users to contact the maker for API help and translation files. · mail-tester.com, 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, 7 Oct 2026
Where Mail-Tester stands on Freedom251
- Email Deliverability Software#8 of 31