In the early days of the Internet, spammers primarily targeted newsgroups on USENET, the online conferencing system. These are newsgroups that are organized as forums to discuss particular topics. As electronic messaging systems advanced, it made possible the practice of crossposting - posting the exact same message to multiple newsgroups and other online forums.
Spammers were quick to adopt crossposting as a tool of their trade. Now, they could send the same electronic message to thousands of newsgroup members at the one time. Not only could they target a larger audience with one posting, but they also did not have to differentiate between the interests and focus of the individual forums that they targeted. What’s more it cost them next to nothing to spam these newsgroups.
As email became an increasingly widespread mode of communication, the spammers shifted their focus the massive audience that it made available to them. Mass emailing software soon became another essential tool of their trade, as they begun to use this application to send junk email to thousands upon thousands of unwilling recipients.
The spam industry also adapted the available Internet technology to create the “spambot”. A spambot is an automated program that will rove the Internet,”harvesting” email addresses from newsgroup postings and from other websites. It literally gathers thousands of email addresses in a single hour. These are compiled into bulk mailing lists with which the spammers can thousands of victims at a time.
