Hi Kriss,What Florent suggested will work with web tracking or app
tracking, but with offline channels, it's not enough. You need to
capture more information like source, file name, workflow name,
timestamp, etc.It's a standard practice to create a separate table for
external tracking logs to capture information from all channels.Usually,
I go with following structure.In your AB testing workflow, you can
combine these two logs using recipient ID and you have everything in
place to truly measure ...