71
Stack Score
Best for
Cold outreach teams and email marketers who want a quick free spam check before launching a campaign.
At a glance
- Pricing
- freemium
- Setup time
- Instant
- Learning curve
- easy
- Last verified
- 5/19/2026
What we love
- ✓Free public test is actually free — no email gate to read scores
- ✓DNS check covers SPF, DKIM, DMARC in one place
- ✓Faster than running a full Mail-Tester suite manually
Where it falls short
- −Single-use tool — no campaign management, no automation
- −Score interpretation can be over-cautious on legitimate content
- −Doesn't simulate actual inbox placement in Gmail/Outlook
Pricing
✓ Pricing verified Jun 21, 20263 tiers
Beginner
$23
per month
- ✓60 email tests per month
- ✓AI email deliverability consultant
- ✓AI email copywriting analysis
- ✓MailGenius cold email guide
Genius
$39
per month
- ✓Unlimited email tests
- ✓AI deliverability consultant
- ✓AI copywriting rewrite
- ✓Test competitor emails
- ✓Cold email guide
Automatic Testing & Monitoring
$79
per month
- ✓Unlimited automatic email tests
- ✓AI deliverability consultant
- ✓Automatic blacklist monitoring
- ✓Unlimited domain monitoring
- ✓Test competitor emails
Why we picked it
Quick sanity check before launching a campaign.
Overview
Tests your email deliverability + spam score. Free single tests; paid for batch.
Key features
- ●Spam test — score an email against major filters before sending
- ●SPF, DKIM, DMARC checker for your sending domain
- ●Subject line analysis for spam-trigger words
- ●Link and image checks for blacklisted domains
- ●Mobile and desktop rendering preview
- ●Free public spam test with no signup required
Best use cases
Pre-send spam check
Score a cold email or campaign before hitting send to catch deliverability red flags.
Domain auth audit
Verify SPF, DKIM, and DMARC are correctly set up on a new sending domain.
Subject line testing
Check whether words and patterns in your subject will trigger spam filters.
Integrations
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