Date Added: Jul 2012
Traditional correspondence system has now been replaced by internet, which has now become indispensable in everyone's life. With the advent of the internet, majority of people correspond through emails several times in a day. However, as internet has evolved, email is being exploited by spammers so as to disturb the recipients'. The entire internet community pays the price, every time there pops a spam mail. Online privacy of the users is compromised when spam disturbs a network by crashing mail servers and filling up hard disks. Servers classified as spam sites are forfeited from sending mails to the recipients'. This paper gives the broader view of spam, issues challenges and statistical losses occurred on account of spams.