E-mail spam is the most common form of internet spamming. It involves sending unsolicited commercial messages to many recipients. Unlike legitimate commercial e-mail, spam is generally sent without the explicit permission of the recipients, and frequently contains various tricks to bypass e-mail filtering. The most dedicated spammers are often those making a great deal of money, or engaged in illegal or immoral activities, such as pornography, online casinos, and internet scams.READ»