When used correctly, email marketing is one of the most powerful digital sales tools available.
I'm sure majority of you receive your emails directly on your phones which is why it's that much more annoying to get unsolicited emails. Most people who receive spam do one of 3 things: delete it, unsubscribe, or report it as spam. Those that unsubscribe are also give the opportunity to mark the email as spam. So, if for some reason you are still purchasing lists in order to send unsolicited emails to people, that means 2/3 of their options involve marking you as spam!