No matter what the contents, e-mails sent to a large set of recipients who have no connection to the sender are considered spam. Spam has annoyed e-mail users and given them a real headache by interrupting their work.When checking their e-mail, many users have the experience of finding their e-mail account no longer functional. No more e- mails can fit because spam has filled their mailboxes. Sending spam is the cheapest way to advertise, since the spammers don·t haYe to bear an operating costs.The most common products advertised, according toSpam-Review. Com, are Rolex watches and Viagra-type drugs. Today, as some antispam software makers reported, spam makes up about 80 to 85% of all the e-mail sent, and that percentage is still growing.