Tracking e-mail opens is directly impacted by the recipient's e-mail software, because tracking an open can only occur when an e-mail's HTML is loaded.
Not all e-mail software loads the full HTML automatically, so automating based on an e-mail open is not super reliable.
Despite this instability in the automation confidence, automating based on e-mail opens can still be leveraged by another legacy merge field hack.
We need to be logged in to Infusionsoft and inside a specific account. We also want to have a functional tag created for the e-mail open.