Angelica, In Mail's Preferences under the General tab, first pull-down menu 'Default Email Reader' is the point to check ;-).
Cheers, PS: This is similar to the default web browser preference which one has to change in Safari's Prefs... >I have been using PM for about 3 weeks and the paid version for about a >week. I have yet to discover the way to make PM my default mail client. >Every time I click on an email address, my computer opens Mail. > > >PM 5.2.3 - Intel iMac - OS 10.4.8 > > >Thanks >Angelica > >