🥊 Korpo.Pro vs Mail-Tester.com
Two email deliverability checkers. One does one thing well. The other gives you 45 tools free. Let's compare them honestly.
Quick Verdict
Mail-Tester.com is great for a single, one-off spam score check. Korpo.Pro is the better choice if you need multiple tools, unlimited checks, no ads, and crypto-native payments.
Try Korpo.Pro Free →📊 Feature Comparison
| Feature | Korpo.Pro | Mail-Tester.com |
|---|---|---|
| Total Tools | 45 free tools | 1 tool |
| Email Spam Score Check | ✅ 15+ signals | ✅ Good |
| MX/SPF/DKIM/DMARC Check | ✅ Full audit | ✅ Included in score |
| DNS Blacklist Check | ✅ 5 DNSBLs | ❌ No |
| Ads on Results Page | ✅ Zero ads | ⚠️ Yes |
| Signup Required | ✅ No signup | ✅ No signup |
| Free Daily Checks | ✅ 5 free / Unlimited with Pro | ⚠️ ~3 per day |
| DNS Lookup | ✅ A/AAAA/MX/TXT/NS/ALL | ❌ No |
| WHOIS Lookup | ✅ Full WHOIS | ❌ No |
| SSL Certificate Checker | ✅ Full TLS inspection | ❌ No |
| SEO Analyzer | ✅ Meta + H1 + links | ❌ No |
| PDF Report | ✅ €9 one-time | ❌ No |
| API Access | ✅ REST API | ❌ No |
| Crypto Payments | ✅ BTC/LTC | ❌ Cards only |
| Privacy Policy | ✅ No tracking, no logs | ⚠️ Ad trackers present |
🔍 Deep Dive
What Mail-Tester.com Does Best
Mail-Tester.com excels at one thing: a quick spam score check. You send an email to their unique test address, and they analyze it from header to footer. They check broken links on images, message size, and SpamAssassin scores — niche details that matter for marketing emails. Their SpamAssassin integration is particularly good.
Where Mail-Tester.com Falls Short
- Ads everywhere. The results page is packed with banners — distracting and unprofessional for business users.
- Only one tool. Need a DNS lookup? WHOIS? SSL check? You'll need a different website for each.
- 3 free tests per day. Heavy users hit the limit fast. No Pro plan to unlock unlimited checks.
- No API. Can't integrate into CI/CD pipelines or automated workflows.
- Fiat-only payments. No crypto option for privacy-conscious users.
Why Korpo.Pro Wins for Most Users
- 45 tools, one dashboard. Everything you need — email, DNS, SEO, SSL, WHOIS, IP, base64, JSON, URL tools and more.
- Zero ads, forever. Clean, professional interface. No banners, no popups, no trackers.
- Privacy-first analytics. No cookies, no IP storage, no query logging. We count pageviews anonymously.
- Pro plan with unlimited checks. €9/month for unlimited email checks, API access, and premium tools.
- Crypto-native. Pay with BTC or LTC. No KYC, no credit cards, no third-party processors.
- PDF reports for €9. Get a professional email health report — perfect for agencies and MSPs.
🤔 When to Use Which?
Use Mail-Tester.com if:
- You need a one-time SpamAssassin check
- You want broken-link-on-images detection
- You don't mind ads on the results page
Use Korpo.Pro if:
- You need multiple tools in one dashboard
- You want zero ads and no tracking
- You pay with crypto (BTC/LTC)
- You want an API for automation
- You need professional PDF reports
❓ FAQ
Is Korpo.Pro really free?
Yes. All 45 tools are free to use with 5 daily checks per tool. Pro plan (€9/month) gives you unlimited checks, API access, and premium tools. No credit card needed for free tier.
Which one is more accurate for spam scoring?
Both use established criteria for spam detection. Mail-Tester.com uses SpamAssassin (good for content-based scoring). Korpo.Pro focuses on domain infrastructure (MX/SPF/DKIM/DMARC/blacklists) — which is the #1 reason emails go to spam. They complement each other well.
Can I use both tools together?
Absolutely! Run a Mail-Tester.com check for SpamAssassin content analysis, then use Korpo.Pro to audit your domain infrastructure and monitor it over time. They're complementary, not competitors.
🚀 Ready to Try Korpo.Pro?
45 tools, zero ads, no signup. Check your domain's email health in seconds. Or get a professional PDF report for €9.
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📊 Professional Email Health Report
Get a detailed PDF audit with step-by-step fixes for your domain's email setup. Includes MX, SPF, DKIM, DMARC scores and recommendations.
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