Talking of emails, we cannot do without mentioning email spam or bulk mail or commercial mail. With more than 85% of emails sent around the world being spam, it's very important to know the background of email spam. Most of us think that email spam is quite a recent phenomenon, but you will be surprised to know that the earliest documented spam was sent way back on May 3rd, 1978, by a DEC (Digital Equipment Corporation) employee using the SNDMSG application. He sent a marketing proposal to almost 400 ARPANET users, but the message was received by only 320 addresses, as that was the addressee limit of the application. Today, email spam is at its worst, with about 100 million spam mails being sent a day.