Tracking custom data with tagging

By default, JustOpened tracks IP-addresses, user-agents, and the date & time of every open. But for professional campaigns, you can also track Custom Data using tags.

What is custom data?

Custom data are like tags that you can add to tracking pixels or URLs. It allows you to differentiate performance across different groups or segments. For example, if you send a newsletter to three different regional groups, you can add group_A, group_B, and group_C as custom data.

This feature works similarly to UTM parameters used in traditional marketing. In JustOpened, we use a single, powerful parameter: cstm_data.

Tip: You can use custom data to find out exactly which recipient opened your email by tagging the link with their unique ID or email address (e.g., ?cstm_data=john@doe.com).

How to implement tagging

When you generate a tracking pixel or URL in your dashboard, you'll see a field labeled "Embed custom data". Simply type your desired tag and click the refresh button. Your code snippets will automatically update to include the tagging parameter.

Example:
Original: https://justopened.com/image/xyz.png
Tagged: https://justopened.com/image/xyz.png?cstm_data=campaign_alpha

Viewing Tag Performance

JustOpened provides two ways to visualize your tagged data directly in the analytics dashboard:

Donut View: A visual breakdown showing the percentage of engagement for each tag. Perfect for quick campaign comparisons.
Table View: A detailed list showing absolute numbers for every custom tag. Essential for high-volume data sets.

Advanced Features

Custom Domains Back to URL Tracking