Spamming

Spamming is the use of messaging systems to send multiple unsolicited messages (spam) to large numbers of recipients for the purpose of promoting a product or service for any prohibited purpose (especially the fraudulent purpose of phishing), or simply sending the same message over and over to the same user.  While the mostly widely recognized form of spam is email, the term can apply to other forms of communication abuses including instant messaging, voice messaging, webforms, etc.