Definition
Cookieless tracking refers to measuring the impact of email marketing without relying on third-party browser cookies. As browsers limit or block third-party cookies, email marketers must rely on other methods to attribute clicks, conversions and behaviour.
The most reliable email tracking methods are first-party. UTM parameters in email links pass campaign data to analytics platforms. Unique click tracking links record email engagement. Logged-in users can be tied to email addresses. Purchase and event data can be matched through CRM or ecommerce platforms.
Email is well positioned for a cookieless future because subscribers are usually known, logged-in or identified at the point of conversion. The challenge is ensuring that email platforms, analytics tools and CRM systems share data consistently and securely.
Best Practices
- Use UTM parameters consistently on every email link.
- Encourage subscribers to log in when clicking through from email.
- Match email addresses to customer IDs in your CRM or ecommerce platform.
- Use first-party data and server-side tracking where possible.
- Prepare reporting for reduced cross-device and cross-browser visibility.
Related Glossary Terms
A/B Testing
A/B testing in email marketing is the practice of sending two variations of an email to a small sample of your list to determine which version performs better before sending the winner to the remaining subscribers.
ARPU (Average Revenue Per User)
ARPU (Average Revenue Per User) is a metric that measures the average revenue generated per email subscriber over a specific period, used to evaluate list value and campaign effectiveness.
Attention Rate
Attention rate is the percentage of email opens that last longer than 5 seconds, distinguishing genuine reads from passive opens, preview-pane views, or Apple MPP auto-loads.
Average Order Value in Email
Average order value in email is the average amount spent per transaction from recipients who clicked through from an email campaign.
Behavioral Segmentation
Behavioral segmentation is the practice of grouping subscribers based on their actions, such as opens, clicks, purchases, browsing and engagement patterns.
Bounce Rate
Email bounce rate is the percentage of emails that were rejected by the receiving server before reaching the recipient. It is a key indicator of list health and data quality.
Frequently Asked Questions
Email is less affected than display advertising because email usually relies on first-party data, UTM parameters and known subscribers rather than third-party cookies.
UTM parameters, unique click tracking, logged-in user identification, CRM matching and server-side analytics are common replacements.
Open tracking uses pixel images, not cookies, but it is becoming less reliable due to Apple Mail Privacy Protection and similar features.
It can be, but you must still comply with consent, transparency and data minimisation requirements under GDPR, CCPA and other laws.
Not necessarily. Pixels still provide useful data, but rely more on click and conversion tracking for accurate attribution.