Open up Apples Mail program and open the preference area go to General and set your "Default Email Reader" there... Doug LaBore > Where do I tell Mac OS X 10.3 > Hey, use Thunderbird as the ALL and ALL mail client please. > > I because, when I click on a mail link it opens Apple mail app. > and I want it to open Thunderbird. > > please give what file, I need to configure. > > Thanks - > Rick