On Mon, Jan 10, 2011 at 2:18 PM, Peggy Yetter <[log in to unmask]> wrote, in part:

I'm finding a lot about using the "Filter=" listserv header
and how it works in addition to the "standard LISTSERV filter"
but I'm having trouble finding a definition of the standard
LISTSERV filter.  Does anyone on this list know?  Thanks in
advance