Like most advertising flyers found in postal mailboxes, millions of emails — now classically referred to as spam — fill email inboxes around the world everyday. Spam can be considered as the most annoying cyber-pollution that targets all of us with tons of unsolicited emails. Those emails usually contain advertisements and spammers are paid to spread as many of them as possible. Though spam should generally not be considered a real cyber attack, it may be difficult to distinguish between virus-contaminated emails, phishing scams and bothersome ads (those containing tricky JavaScript or specific forged HTML used to track them). Moreover, spammers slow the servers receiving legitimate emails and may cause availability problems. While spammers earn money by embarrassing people, employees and netsurfers lose time by receiving unsolicited emails — in some cases, hundreds per day. Companies may lose money too, through lost productivity, bandwidth charges, purchasing blacklists, and so on. Typical solutions against this cyber-plague may be to filter emails received by using content analysis or blacklists, and to fix poorly configured servers. Full Story
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