Mail-Tester review (2026): is the free plan enough?
Send an email to a test address and get a spam score out of 10
Black Friday: is there a Mail-Tester sale?
Mail-Tester report card
Good · out of 4.0 · graded Nov 12, 2026
Best for checking one email's spam score
Mail Tester scores one test email out of 10 and shows what is wrong with it. Free gives you 3 tests in 24 hours with no account, but it runs a stock SpamAssassin setup that other filters do not match, tests one message at a time and does not monitor anything over time.
Who Mail-Tester is for
- Fits if you want to check one newsletter or template before sending
- Works for developers who want the score inside their own tool
Who Mail-Tester is not for
- Tight if you test more than 3 times a day on free, with results kept for 7 days
- Skip it if you want ongoing monitoring, since it tests one message at a time
- Watch out: the score comes from SpamAssassin and other spam filters differ
- Watch out: prices exclude VAT
Why Mail-Tester gets a 2.8
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- BValue for moneySubscriptions start at $10 a month for 50 tests, level with the $10 cheaper quarter of deliverability tools. A 10-test pack is $5, and prices exclude VAT.
- BFree plan and trial3 tests in any 24 hours with no account, results kept for 7 days. One person checking now and then can live on that.
- CFeaturesA spam score, a configuration report and a JSON API. It uses a stock SpamAssassin setup, so a perfect score does not guarantee inbox placement, and it does one message at a time. It does that job fully, and it is a smaller job.
- BEase of useNo store rating on record. You send a mail to a displayed address and read the result, so there is nothing to set up.
- BPlatforms and integrationsWeb only, with a JSON API, an iframe and white-labeling. No desktop or phone app.
What these grades rest on. Graded from this listing, whose facts were read from Mail Tester's own pages on 12 November 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
Make Mail-Tester? Put this grade on your site
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<a href="https://toolgpa.com/tools/mail-tester#review"><img src="https://toolgpa.com/badge/mail-tester.svg" alt="Mail-Tester: 2.8 GPA on ToolGPA" width="196" height="56"></a>Where Mail-Tester stands among email verification and deliverability tools
Mail-Tester's GPA of 2.8 is higher than 35 of the 38 other email verification and deliverability tools we grade, and level with 2.
It stands best on free plan and trial (B, above 34 of 38) and worst on features (C, above 0).
Its paid plans start at $10 a month, against a middle price of $17.49 for the category: 5 of the 25 others that charge start lower.
On features, ease of use and platforms it scores 2.7 out of 4. Nothing scores higher for less, though at least one tool matches that score at a lower price.
Each grade against the category
Every bar is all 39 email verification and deliverability tools we grade, cut by the letter each got. Mail-Tester’s own letter is outlined.
- BValue for moneyAbove 25 of 38, level with 11
- BFree plan and trialAbove 34 of 38, level with 4
- CFeaturesAbove 0 of 38, level with 23
- BEase of useAbove 30 of 38, level with 8
- BPlatforms and integrationsAbove 14 of 38, level with 24
Price against what you get
Each dot is one of 26 email verification and deliverability tools. Further left costs less, and higher up scores better on features, ease of use and platforms. Point at a dot to see which tool it is.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Keep Mail-Tester, or make your own?
Your call
You could make the core of Mail-Tester for yourself: reports.
What you would give up is listed below. Whether that is worth the price is your call. It costs $120 a year.
What you could make
- Reports: an app builder makes this well.
- It runs in a browser, which is where something home-made would run too.
What you could not
- An API that other software can build on.
What this rests on. Mail-Tester’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
What is Mail-Tester?
Mail-Tester gives each visitor a random address to send a message to, then analyzes the message, the sending server and the sending IP and shows a score out of 10 with a report of what is and is not configured properly. The web interface is free for a few tests a day. Paid accounts add a JSON API, an iframe, white-labeling and longer result history.
Worth knowing
- Scores come from a stock SpamAssassin setup; the FAQ says other spam filters differ, so a perfect score does not guarantee inbox placement.
- The free version allows 3 tests in 24 hours and keeps results for 7 days; an account with your own prefix keeps them 30 days.
- Prices exclude VAT.
- It tests one message at a time and does not monitor sending over time.
Key features
- Spam score
- Scores a sent message out of 10 using a default SpamAssassin install, with the sign reversed so that a higher score is better.
- Configuration report
- Reviews the message, the mail server and the sending IP, and lists what is set up correctly and what is not.
- JSON API and iframe
- Paid plans let you embed mail-tester results in your own software.
- White-labeling and custom CSS
- Accounts can restyle the result page and fully white-label it, after contacting the company to authorize their domain.
- Usage statistics and history
- Daily, weekly and monthly usage statistics and a list of the last 30 days of tests, with no ads on results.
Mail-Tester pricing
As of Nov 12, 2026, Mail-Tester has a free plan, and paid plans start at $10 per month for 50 tests; or $5 once for 10 tests.
- Starts at
- $10 per month for 50 tests; or $5 once for 10 tests
- Free plan
- Free web interface: 3 tests per 24 hours, results kept for 7 days.
- Free trial
- None listed
| Plan | Price | What you get |
|---|---|---|
| Free web interface | $0 | 3 tests in any 24 hours, no account needed, results available for 7 days. |
| 10 Tests | $5one-time | A pack of 10 extra tests at $0.50 each. Larger one-time packs run up to 15,000 tests for $700. |
| 50 Tests / Month | $10per month for 50 tests | Subscription with an account; $0.20 per test. |
| 500 Tests / Month | $25per month for 500 tests | $0.05 per test. |
| 2,000 Tests / Month | $80per month for 2,000 tests | Marked most popular on the page; $0.04 per test. |
| 7,500 Tests / Month | $250per month for 7,500 tests | $0.0333 per test. A 25,000-plus tier is quoted on request. |
Read from mail-tester.com on Nov 12, 2026. Prices change, so confirm with Mail-Tester before you buy.
Mail-Tester alternatives
- Mail-Tester vs GlockApps
Free plan · from $59/mo
- Mail-Tester vs MxToolbox
Free plan · from $129/mo
- Mail-Tester vs MailReach
From $20/mo
- Mail-Tester vs Warmy
Free trial · from $49/mo
- Mail-Tester vs InboxAlly
Free trial · from $149/mo
Common questions
Does Mail-Tester have an Android app?
No Android app was listed when its pages were read on Nov 12, 2026. Mail-Tester is listed for Web.
Does Mail-Tester have an iPhone app?
No iPhone app was listed when its pages were read on Nov 12, 2026. Mail-Tester is listed for Web.
Is Mail-Tester open source?
Mail-Tester is not described as open source on its own site, as read on Nov 12, 2026.
Does Mail-Tester have an API?
Yes. Mail-Tester offers a public API, according to its own site.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Nov 12, 2026.