You need an email application and a mail server connection to send a PDF for review and to send comments. Acrobat supports most email applications. If more than one email application is installed on your system, Acrobat might not start the preferred application when it sends a PDF as an attachment. To specify which application starts, do one of the following:
(Windows) Double-click Internet Options in the Control Panel. In the Internet Properties dialog box, select the Programs tab, and then select the preferred email application. Restart Acrobat for the changes to take effect.
(Windows) Change the MAPI settings in your email application. Adobe Reader uses the Messaging Application Program Interface (MAPI) to communicate with your email application. Most email applications come with MAPI settings to handle this communication. For more information on configuring your email applications, see the email application’s Help.
(Mac OS) In Mail, choose Mail > Preferences, select General, and then choose the preferred email application from the Default Email Reader menu. Restart Acrobat for the changes to take effect. If your application isn’t listed, choose Select from the menu and browse to the location. If you select an application that isn’t listed in the Default Email Reader menu, Acrobat may not support it.
After you verify that Acrobat works with your email application, you can initiate a review.