Matching on file list of addresses?

Can somebody tell me which approach I would take to have a procmail rule
read from a list of email addresses contained in a file?  What I would
like to do is send a message received confirmation to people I know
(listed in a text file).

Thanks.

Mike.

======================================================================
  Mike Frisch                         Email: 
mfrisch(_at_)saturn(_dot_)tlug(_dot_)org
  Northstar Technologies        WWW: http://saturn.tlug.org/~mfrisch
  Newmarket, Ontario, Canada