Thank you both!
Shal, good to know that digests are cleaned up at least, and yes, I've observed the blue "..." on the web interface. It's not so bad for those reading individual emails, as you say.
Duane, that is just what I want to say! May I borrow your guideline on that? And is the information you mention on "Trimming Message Clutter" available somewhere public where I could link to it in my group's Wiki?
Thanks,
Su