> We just switched to Listserv Lite from another mailing list software
> package, and a lot of our subscribers aren't receiving messages. The
> admin of the old system said it may be because messages are marked
> "From" the original sender -- and because that sender isn't local to the
> mailing list machine, the messages are getting marked as spam.

This is not likely, especially if the new server was an established
LISTSERV server. If you are running LISTSERV Lite yourself, then you need
to post to the LISTSERV Lite List : [log in to unmask]

> Is there any way to set the "From" header to be the list address rather
> than the person's address?

No.