Open up preferences in Acrobat, then go to "Email Accounts" category. Click on "Add Account" and select "Gmail" from the list:
This will then ask you for your email address. Make this the default, and the next time you want to send an email, it should be used.
Karl Heinz Kremer
PDF Acrobatics Without a Net
PDF Software Development, Training and More...
http://www.khkonsulting.com