I suspect this refers to the Filter your Listserv Postmaster has defined.

Cheers, Wayne

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
>