A shortened version of an email newsletter which replaces full-length articles with clickable links to the full article at a Web site, often with a brief summary of the contents.

3 Quick And Easy Ways To Build A Profitable Opt-In List
You finally realize that you need a good opt-in list. After reading countless articles and sought expert advices and have read many success stories of people creating a small fortune with opt-in lists you finally decide to have one of your own.