On Fri, 24 May 2002, Curt Smith wrote:

The lack of e-mail detailing financial transactions is also the reason many businesses chose not to incur the overhead of secure communications.

If there were servers on the internet which automatically displayed all plaintext e-mail messages which passed through them as webpages (for the bored, curious, and opportunistic), THEN everyone would see the value of encrypted e-mail.

http://www.shmoo.com/~pablos/pages/RandomMailReader.html