To Spam or Spamming is the abuse of electronic messaging systems to send unsolicited bulk messages, which are generally undesired. The most widely recognized form of spam is Email Spam: otherwise referred to as Unsolicited Bulk Email or Junk email. Email Spam is both unsolicited by the recipient and sent in substantially identical form to many recipients simultaneously or over a period of time. Spam or Junk email can be either commercial mail such as an advertisement or noncommercial such as a chain letter or a joke.