Patent ID: 7765268

Claim:
A data processing system for determining user uniqueness in e-mail campaigns, comprising: a bus, a storage device connected to the bus, wherein the storage device contains computer usable code; a communications unit connected to the bus; and a processing unit connected to the bus, wherein the processing unit executes the computer usable code to compose an e-mail, wherein the e-mail comprises a section, wherein the section is expandable to present additional content associated with the section; to place a first instruction set in an e-mail to form a modified e-mail, and to send the modified e-mail to a distribution list, wherein the first instruction set is executed in response to the modified e-mail being opened, wherein the instruction set identifies a reader of the modified e-mail based on an e-mail address of the reader and sends information to a collection device about the modified e-mail and an identification of the reader that opened the modified e-mail, and wherein the second instruction set is executed in response to the section being opened, wherein the second instruction set sends information associated with the section to the collection device, wherein the information associated with the section identifies a number of times the section is expanded within the modified e-mail.