Is there a difference between sending an e-mail to a group of people and spam? Is the difference based on the number of people contacted? If so, where is the dividing line between contacting a bunch of folks and sending spam? Or is it something else? Is it a matter of the intent of the sender? If you are letting a bunch of people know about something is that different from electronic cold call selling? Is it a function of the content of the message? Does it matter whether you know all of the people on the list? Is it a depersonalization issue? What is the essential property of spam?