Taxonomy of Email Chains

Family Pyramides This family is named for the pyramid scheme structure common to all members of the family. Each specimen in this family will include a list of addresses of its last 4 to 10 hosts, and instructs the current host to alter this list by adding his or her address to this list and removing the oldest address from it. Hosts are also directed to send a small sum of money to each name on the list. Family Petitiones Members of this family are characterized by the additional behaviou...