Email Deliverability Health Score
Score email deliverability based on bounce rates, spam complaints, and authentication. Enter values for instant results with step-by-step formulas.
Formula
Health Score = ฮฃ(Metric Score ร Weight) where weights sum to 100%
Each metric (bounce, spam, open, click, unsub, auth) is scored 0-100 based on industry benchmarks, then weighted by impact on deliverability. Spam complaints weighted highest (25%).
Worked Examples
Example 1: Healthy E-commerce Newsletter
Problem:Monthly newsletter: 1.5% bounce, 0.03% spam complaints, 28% open rate, 4.5% click rate, 0.2% unsubscribe, full authentication.
Solution:Scores:\nBounce: 90 (1.5% is good)\nSpam: 100 (0.03% excellent)\nOpen: 85 (28% above average)\nClick: 85 (4.5% strong)\nUnsub: 100 (0.2% low)\nAuth: 100 (full SPF/DKIM/DMARC)\n\nWeighted: 90ร0.2 + 100ร0.25 + 85ร0.15 + 85ร0.1 + 100ร0.1 + 100ร0.1\n= 18 + 25 + 12.75 + 8.5 + 10 + 10 = 94.25\n\nGrade: Excellent\nNo critical issues
Result:Score: 94/100 (Excellent) | Maintain current practices
Example 2: Struggling SaaS Campaigns
Problem:Product updates: 4% bounce, 0.15% spam, 12% opens, 1% clicks, 0.8% unsub, partial auth (no DMARC).
Solution:Scores:\nBounce: 50 (4% is high)\nSpam: 40 (0.15% above threshold)\nOpen: 50 (12% is low)\nClick: 50 (1% is weak)\nUnsub: 60 (0.8% elevated)\nAuth: 60 (missing DMARC)\n\nWeighted: 50ร0.2 + 40ร0.25 + 50ร0.15 + 50ร0.1 + 60ร0.1 + 60ร0.1\n= 10 + 10 + 7.5 + 5 + 6 + 6 = 54.5\n\nGrade: Fair\n\nCritical issues:\n1. Spam complaints too high\n2. List needs cleaning (bounce rate)\n3. Add DMARC immediately
Result:Score: 55/100 (Fair) | Fix spam complaints & auth urgently
Example 3: Cold Outreach Disaster
Problem:Sales outreach: 8% bounce, 0.5% spam, 8% opens, 0.5% clicks, 1.5% unsub, no authentication.
Solution:Scores:\nBounce: 20 (8% is terrible)\nSpam: 10 (0.5% = blacklist risk)\nOpen: 30 (8% very low)\nClick: 30 (0.5% minimal)\nUnsub: 30 (1.5% very high)\nAuth: 20 (no SPF/DKIM/DMARC)\n\nWeighted: 20ร0.2 + 10ร0.25 + 30ร0.15 + 30ร0.1 + 30ร0.1 + 20ร0.1\n= 4 + 2.5 + 4.5 + 3 + 3 + 2 = 21\n\nGrade: Critical\n\nImmediate actions needed:\n1. STOP sending until fixed\n2. Implement all authentication\n3. Verify email list\n4. Review opt-in process\n5. Check blacklists
Result:Score: 21/100 (Critical) | STOP - major deliverability crisis
Frequently Asked Questions
What is email deliverability?
Deliverability is the ability to reach the inbox (not spam/junk). It depends on sender reputation, authentication, content quality, and recipient engagement. High deliverability means 95%+ inbox placement.
What is email warmup?
Gradually increasing send volume from a new IP/domain to build reputation. Start with 50-100 emails to engaged users, increase 20-30% daily over 2-4 weeks. Rushing causes blocks.