I'm going to leave the list because I just don't have time to keep up with it and most of the subject matter desn't mean much to me. I joined for a little help setting up Postfix for local mail only.
I want to say, though, that i really admire Wietse Venema for having apparently done such a good job of creating and maintaining Postfix and the core contributors for your thorough understanding of the configuration. I wasn't previously aware of the complexity of serving mail. It's the kind of challenge I would love to have in my job. Easy for me to say, I know. So my hat's off to all you mail-server administrators. Sincerely, Bruce Hyatt