Email is still the King in Internet marketing. Many people consider it the most powerful promoting tool ever devised, and if this still hasn't really changed.Why is it so? The main reason must be the wide use of email. One study published by the US Department of Commerce established that using email made 84% of all Internet users' activity online, and that nearly half (45%) of the US population now uses email.Another reason must be that email ads produce by far the highest response rates among .