With the Latest Software, Track How Your Readers are Interacting With Your E-Newsletter
http://www.iabc.com/cwb/archive/2005/0305/newsletters.htm

Dysart, Joe
Communication World Bulletin
2005

Abstract:

While webmasters have long been able to study how site visitors interact with a web site, e-mail has been more elusive. No more. With the latest generation of smart e-mail software, marketers can now essentially look over the shoulders of their readers, seeing first-hand what works, what needs improvement and what is simply falling on deaf ears.