Esther Schindler’s article on e-mail for managers is out, and it contains a short paragraph proposed by yours truly:

From the server’s point of view, the only thing that matters for routing is the e-mail envelope. This is easily visualized. Grab a sheet of paper, write any name on it (say, “Esther”) and fold the page into an “envelope.” Write a different name on the envelope (for example, “Sandy”). The envelope will be “routed” through the post office to Sandy, independent of whatever the envelope contains.

Read the article, or better yet, print it out for your executives. :-)