Email marketing is something that has been around for a while already. There are many people out there who believe it to be dead, however, statistics beg to different. A recent study by Statista shows, that just in 2017 the total number of email users was somewhere around 3,7 billion and by 2021 this number is predicted to get higher than 4 billion. At the same time, the general number of email’s ROI is 122%, which is a few times more than any other marketing channel, even the popular these days social networks.