Email Link Tracking Accuracy

Definition

Link tracking accuracy describes how closely reported click counts correspond to real subscriber actions. Email click tracking, while generally reliable, is subject to specific types of distortion. Understanding these distortions prevents marketers from misinterpreting their campaign data.

Inflation occurs when link security scanners, preview panes that pre-fetch links, or automated filtering systems trigger click events that a real subscriber never initiated. Undercounting occurs when images are blocked, JavaScript is disabled on landing pages or subscribers use privacy features that strip tracking parameters from URLs.

Common Sources of Distortion

• Bot clicks: Security scanners at corporate email gateways click every link to check for phishing. These show up as clicks with zero time-on-page
• Apple Mail Privacy Protection: Pre-fetches content but not links; less impact on click tracking than opens
• Link shorteners: Additional redirect layers can introduce latency and tracking gaps
• Ad blockers: Some desktop and mobile plugins strip UTM parameters from tracked links

Best Practices

• Filter out clicks that occur within seconds of send without subsequent page engagement
• Use first-party click tracking domains rather than generic shared domains to reduce filtering
• Cross-reference click data with landing page analytics for validation
• Treat very high link click rates, especially on the first link in an email, with healthy scepticism