regarding the reply address on the list....

Jay West wrote:

I've had a fair amount of experience using (and setting up and running) quite a few mailing lists. The way they were always set up was the user sent to the list, and the list sent the mail back to all the subscribers with the reply address being the user who sent the post originally. In this manner if you hit the REPLY button to a post, your message goes to the person who sent the post, not the list. If you hit the REPLY ALL button, then your response went to the list AND the original poster. This is how 99.9% of all the lists I've ever seen are configured. As a result, I've always wondered why on classiccmp the reply address was the list. Using that method the benefit is that everyone can see what's going on. The drawback is it's very very easy to send posts intended to be private to the list.