Outlook should just cut e-mails off at five lines

We know, from some form of research, that human attention span has decreased over time -- and we know that the average time someone reads an e-mail is about 30 seconds before they kind of lose the task/focus associated with it. 30 seconds is probably about 4-5 lines. We also know that 89 billion e-mails are sent for a business purpose in a given day -- …