MailStackDB
33+ Tools ReviewedUpdated March 2026Independent & Unbiased

Mail-Tester

Free email spam score checker.

4.3
freemiumFounded 2012
Best for everyoneBest for beginners

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Mail-Tester Review

Mail-Tester is a free email spam score checker. It is one of the leading tools in the deliverability testing space, designed for everyone, beginners. Key features include Spam score analysis. Mail-Tester has built a strong reputation for reliability and performance in the cold email infrastructure ecosystem. The platform is well-suited for teams that need everyone capabilities without sacrificing deliverability or ease of use. Whether you are scaling an outreach operation or optimizing an existing one, Mail-Tester provides the tools and infrastructure to do it effectively. Mail-Tester integrates with popular tools in the cold email stack, making it easy to fit into existing workflows. The pricing is competitive for the feature set offered, and the platform is regularly updated with new capabilities based on user feedback. For teams evaluating deliverability testing solutions, Mail-Tester is worth serious consideration. It balances features, pricing, and usability in a way that works for both beginners and experienced cold email operators.

Mail-Tester Pricing

Free

$0/mo
  • 3 tests/day

Unlimited

$0/mo
  • $20 one-time for unlimited

Features

FeatureStatusDetails
Email Warmup
SMTP Rotation
Inbox Rotation
Email Verification
A/B Testing
AnalyticsSpam score analysis
CRM Integrations
API Access
Team Features
Deliverability Monitoring
Spintax Support
Subsequences
Lead Database
Unified Inbox
Custom Tracking Domain

Pros & Cons

Pros
  • Free to use (3 tests/day)
  • Instant spam score
  • Checks SPF/DKIM/DMARC
  • Very easy to use
Cons
  • Limited tests on free
  • No monitoring
  • Basic tool
  • No API

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Free email spam score checker.