Here I leave you some interesting Charts from the eMarketer note called “Who is Most Engaged with E-Mail?”, can we generate clusters based on the different Web Mails to optimize ROI? Even when a Web Mail is just a Web Mail and using one or the other seems to be just a casual decision, they behave really different regarding Open Rate, Click Rate, Soft and Hard Bounce rate, Abouse, Unsubscribe, etc. Lets take a look.