Mail-Tester.com Review: Pricing, Pros & Cons (2026)
Only 13% of email senders actually test inbox placement, and 59% never monitor blocklists at all. The rest rely on spam score tools like mail-tester.com and assume a high score means their emails land in the inbox. That assumption is wrong - and it's the single biggest gap most review sites gloss over.
Here's a full look at what mail-tester.com actually does well, what it misses, and when you need something else entirely.
30-Second Verdict
Mail-tester.com is a great free tool for checking your SPF, DKIM, and DMARC setup. It's fast, requires no registration, and gives you a clear 10-point score. But that score measures your configuration, not your inbox placement. A 10/10 doesn't mean your emails reach the inbox.
Use it for quick pre-send config checks. Outgrow it when you need real inbox placement data or when your contact list is the actual problem.
What Mail-Tester.com Actually Does
You send an email to a randomly generated test address, then check mail-tester.com for your score. The tool analyzes your message against SPF, DKIM, DMARC, and content heuristics, then returns a report on a 10-point scale. The free tier gives you 3 tests per 24-hour window, and results stick around for 7 days. No account needed.
For context, over 80% of domains still lack DMARC enforcement, which is exactly the kind of misconfiguration this tool catches fast. In our testing, the 3-test daily limit is enough for most pre-campaign checks.
Don't confuse it with mailtester.com. The no-hyphen version - mailtester.com - is a completely different product. It's an email verification tool that checks whether addresses are valid, starting at $19 for 5,000 verifications. Different company, different job. If you've seen a review citing "$19 for 5,000 emails" as mail-tester.com pricing, that article is reviewing the wrong product. The two get conflated constantly, and it makes comparison shopping a mess.
Pricing Breakdown
Mail-tester.com sells credit packs - no subscriptions, no recurring charges. Credits never expire, which is genuinely nice for teams that test sporadically.
| Credit Pack | Price (excl. VAT) | Per-Test Cost |
|---|---|---|
| 500 tests | $50 | $0.10 |
| 1,000 tests | $80 | $0.08 |
| 5,000 tests | $250 | $0.05 |
| 20,000 tests | $700 | $0.035 |
| 100,000 tests | $2,500 | $0.025 |
| 1,000,000 tests | $20,000 | $0.02 |
A paid account unlocks the JSON API, iframe integration, white-labeling, custom CSS on result pages, 30-day test history (vs. 7 days free), and no ads. For most teams, the 500 or 1,000 pack is plenty. The volume tiers exist for platforms embedding the tool into their own products.
Mail-tester.com checks your authentication. It can't check your contact list. Bad addresses cause bounces that tank sender reputation - no SPF record can save you. Prospeo's 5-step verification delivers 98% email accuracy at ~$0.01 per email, with catch-all handling and spam-trap removal built in.
Start with 75 free email verifications - no credit card, no sales call.
Pros and Cons
Pros:
- Free for basic use - 3 tests per day, no registration, no credit card
- Fast and simple - send an email, get a score within seconds
- Strong SPF/DKIM/DMARC diagnosis that catches misconfigured DNS records quickly
- Credits never expire on paid plans
- Entirely browser-based, no install required
Cons:
- The score doesn't reflect real inbox placement. A r/sysadmin user reported a perfect score while 100% of their emails hit Outlook junk. Another on r/Emailmarketing got 10/10 with all authentication passing - still spam across multiple inboxes
- Results vary by location. One Trustpilot reviewer tested the same setup from Paris (6.5/10), Bucharest (10/10), and Manila (9.5/10) - no VPN
- No ongoing monitoring - it's a point-in-time snapshot, not a dashboard
- Lacks actionable fix guidance. A G2 reviewer flagged this: the tool tells you something's wrong but doesn't explain how to fix it
- Capterra reviewers note it used to be fully free and now pushes paid/premium, with some complaints that accuracy has declined
What Users Say
Review scores tell a mixed story. G2 has it at 4.2/5 from 10 reviews - praise centers on speed and simplicity. Capterra sits lower at 3.3/5 from 12 reviews. Trustpilot lands at 3.5/5 from 11 reviews, with the most pointed complaints about score inconsistency.
The consensus: great for a quick DNS sanity check, misleading if you treat the score as a deliverability guarantee.
When to Use Something Else
Mail-tester.com covers one layer of the deliverability stack. When you need more, here's where to look.
GlockApps - Inbox Placement Testing
GlockApps answers the question mail-tester.com can't: did your email hit the inbox, spam folder, or vanish entirely? It sends to seed addresses across 20+ major providers and shows you inbox vs. spam vs. missing breakdowns. Pricing starts at $0 (2 spam test credits), then $59/mo for Essential (360 credits), $99/mo for Growth, and $129/mo for Enterprise. The $59/mo Essential plan pays for itself the first time it catches a placement issue before a campaign goes out.
If you're running cold outbound at any real volume, this is the tool that actually tells you what's happening after you hit send. We've used it alongside config checks and the gap between "your setup looks clean" and "your emails are actually landing" is often shocking.
Skip Mailtrap Unless You're a Dev Team
Mailtrap isn't a mail-tester.com replacement. It's an email testing sandbox plus transactional sending platform built for developers testing templates in staging environments. Free tier handles 4,000 emails/month, and paid plans start at $15/mo. If you're not writing code, you don't need it.
The Upstream Problem Nobody Tests
Here's the thing: most deliverability problems aren't configuration problems. They're data problems. We've seen teams waste weeks troubleshooting SPF records and content heuristics when the real culprit was a contact list full of invalid addresses. Bounces destroy your sender reputation regardless of what your spam score says - and mail-tester.com has no way to catch that.
One agency we spoke with had a perfect 10/10 score, clean DMARC, the works. Their reply rates were still tanking. Turned out 30%+ of their list was dead addresses from a stale CRM export. No amount of authentication tuning fixes that.
Prospeo handles this upstream layer with a 5-step verification process, catch-all handling, and spam-trap removal, delivering 98% email accuracy on a 7-day data refresh cycle. The free tier gives you 75 email verifications plus 100 Chrome extension credits per month, and paid plans work out to roughly $0.01 per email.
| Tool | What It Tests | Free Tier | Paid From | Best For |
|---|---|---|---|---|
| Mail-Tester.com | SPF/DKIM/DMARC/content | 3 tests/day | $50 (500 credits) | Config spot checks |
| Prospeo | Contact data accuracy | 75 emails/mo | ~$39/mo | List hygiene |
| GlockApps | Inbox placement | 2 credits | $59/mo | Where emails land |
| Mailtrap | Email sandbox + sending | 4,000 emails/mo | $15/mo | Dev/staging testing |
The agency in this article had a perfect 10/10 score and a 30% dead-address rate. That's not a configuration problem - it's a data problem. Prospeo refreshes every record on a 7-day cycle so your list never goes stale, and removes spam traps and honeypots before they torch your domain.
Stop debugging DNS when your list is the real problem.
FAQ
Is mail-tester.com free?
Yes, for up to 3 tests per 24 hours with no registration required. Results stay accessible for 7 days. Paid credit packs start at $50 for 500 tests and unlock API access, 30-day history, and ad-free reports. Credits never expire.
Does a 10/10 score guarantee inbox delivery?
No. A perfect score confirms your SPF, DKIM, DMARC, and content heuristics look clean - it doesn't test actual placement across Gmail, Outlook, or Yahoo. For real inbox-vs-spam data, use a seed-list tool like GlockApps that sends to live inboxes and reports where messages land.
What's the difference between mail-tester.com and mailtester.com?
Completely different products from different companies. Mail-tester.com (with hyphen) tests your email's spam score and authentication setup. Mailtester.com (no hyphen) is an email verification service checking whether addresses exist, starting at $19 for 5,000 credits.
How do I fix deliverability if my score is already 10/10?
Check your contact list first. Bounces from invalid addresses tank sender reputation faster than any content issue. A free verification tool can audit a test segment before you scale sends - even a small sample of 50-75 emails will tell you whether your list is the bottleneck.