By eHow Computers Editor
Rate: (5 Ratings)
The earliest unsolicited mail delivered by electronic means occurred in the early 1900s by telegram. Fortunately, this early form of spam could be easily ignored by not replying to the message. Telegram spam didn't last long, because it was cost prohibitive to advertisers. Today, spam has run rampant, with billions of spam messages being delivered every week. To combat spam, SBCglobal began to use special spam filters.