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This is the recipient’s unique identifier.

The recipient ID must be a unique variable for the opener.

This variable is required. It is used to generate unique statistics by uniquely identifying the openers with an ID found on your router.

It also allows us to identify the behavior of each opener for setting up numerous scenarios such as "viewed/clicked blocks” and RealTime Testing, which will not work properly without a unique recipient ID for the opener.

The variable to be used must match your router.

It will automatically be changed at the time of sending to be appended to the image hosting and redirect URLs.

It can be your customer’s encrypted email variable, a unique recipient ID, or even a customer number. It simply needs to be unique to each recipient.

Sample variable: <%= recipient.customerid %><%= recipient.customerid %>

For each block, enter the variable in the designated field.