alright.. problem resolved.. I was going about it the wrong way from
the beginning...
my filter:

# Exim filter

if error_message then finish endif

if
 $header_to: matches "-group@"
then
// do stuff
endif

reference:
http://www.exim.org/exim-html-4.40/doc/html/filter_3.html

c

On 6/11/05, fci <ces.fci at gmail.com> wrote:
> correction, if something like this would work, it would be fine as well..
> *-group at domain.com: |/path/to/script
> 
> which works if I send it to "*-group at domain.com" .. so it doesn't
> check for a match..
> 
> clayton
> 
> On 6/11/05, fci <ces.fci at gmail.com> wrote:
> > currently we can only manually do:
> > blah at domain.com: |/path/to/script
> >
> > I want to be able to do something like this:
> > /^(\w+)\-group at domain.com$/: |/path/to/script
> >
> > clayton
> >
>