How to Send an Email to Undisclosed Recipients in Outlook Express

"There is no tr in mesos," remarked Heisenberg, the son of a professor for Middle and New Greek, when the name mesotron was proposed for a new (predicted) particle. The name was changed to meson (after, as we have seen, Greek mesos, the middle; it was believed mesons would be particles of middle mass, lighter than protons but heavier than electrons), but the particles made up of a quark and an anti-quark still belong to Hideki Yukawa, their discoverer and name giver whose 100th birthday is today.
What's more, tron is a perfectly valid (albeit infrequent) Greek suffix indicating a place. With all that uncertainty concerning mass, place, speed and what not in modern physics, "middle ground" sounds like a proper name.
Speaking of uncertainties and invisible but effective forces, how about email recipients that get a copy but do not show up as addressees in the message?
›› When you send an email to a group of recipients, would you rather not have everybody be able to see all the other people's names and addresses? Here's how easily that is accomplished in Outlook Express.