Why would you develop a email marketing module in NXT and encourage clients to move away from online express when you can not add email performance stats to the constituent records. What a wast of my team's time to try and convert to NXT module. We should have stuck with online express.
There should be info on the constituent's email history tile? https://webfiles-sc1.blackbaud.com/files/support/helpfiles/rex/content/bb-comm-history.html?Highlight=EMAIL%20HISTORY