Analytics & Reporting

Understanding Email Analytics and Key Metrics

January 30, 2026 2 min read 1,495 views Guide

Key Email Metrics

Open Rate

Formula: (Unique Opens / Emails Delivered) × 100

  • Industry average: 20-25%
  • Tracked via invisible 1×1 pixel image
  • Affected by Apple MPP (inflated for Apple Mail users)

Click-Through Rate (CTR)

Formula: (Unique Clicks / Emails Delivered) × 100

  • Industry average: 2-5%
  • More reliable than open rate
  • Measures actual engagement

Click-to-Open Rate (CTOR)

Formula: (Unique Clicks / Unique Opens) × 100

  • Industry average: 10-15%
  • Best measure of content effectiveness
  • High CTOR = good content, regardless of subject line

Bounce Rate

Formula: (Bounces / Emails Sent) × 100

  • Should be under 2%
  • Hard bounces: permanent (invalid email)
  • Soft bounces: temporary (mailbox full)

Complaint Rate

Formula: (Spam Complaints / Emails Delivered) × 100

  • Must stay below 0.1%
  • Higher = ISPs may throttle or block you
  • Gmail's threshold: 0.3% (danger zone)

AcelleMail Dashboard

Your campaign report includes:

  • Real-time delivery progress
  • Open and click tracking (hourly breakdown)
  • Geographic map (opens by country)
  • Device breakdown (desktop vs mobile)
  • Click map (visual heatmap of link clicks)
  • Subscriber-level engagement data
  • Export to CSV for further analysis

What Good Looks Like

Metric Poor Average Good Excellent
Open Rate <15% 15-20% 20-30% >30%
CTR <1% 1-2% 2-5% >5%
Bounce Rate >5% 2-5% 1-2% <1%
Unsub Rate >1% 0.5-1% 0.1-0.5% <0.1%

Improving Your Metrics

  • Low opens? → Test subject lines, send times, sender name
  • Low clicks? → Improve CTA placement, content relevance, design
  • High bounces? → Clean your list, verify emails before import
  • High complaints? → Send more relevant content, honor frequency expectations
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AcelleMail Team