Pkg exim4 users - Jan 2012 - Exim filter and old messages

I put a new .forward file with my Exim filter that works fine with the 
new messages
sent to my account. But it is possible to arrange the filter so that it 
works also
on the messages sent before ?

Thank You
Regards

--- On Mon, 1/16/12, l.rinetti at movimatica.com <l.rinetti at
movimatica.com> wrote:
> I put a new .forward file with my
> Exim filter that works fine with the new messages
> sent to my account. But it is possible to arrange the
> filter so that it works also
> on the messages sent before ?
> 
  Messages that passed your old .forward are already delivered.
Aren''t they?  If you want your new .forward to process delivered
messages you''ll have to somehow arrange to have them sent again.
  I guess I totally misunderstand your question.