Forty years ago an enthusiastic tech marketer named Gary Thuerk made history by creating the world’s first ever known spam mail. Gary blasted out a new product announcement (in ALL CAPS, of course) to 400 recipients via ARPANET, a network of connected computers. The response? Largely negative, with one indignant recipient calling it “A FLAGRANT VIOLATION.”
By some accounts, spam now accounts for more than 80 percent of all email sent—so the big email service providers, like Google and Hotmail, aggressively filter out potentially unwanted messages. As a result, even legitimate organizations sometimes find their emails filtered out of the inbox.