设置用于书写邮件的应用程序
When you click a button or link to send a new email (for example, in your word processing application), your default mail application will open up with a blank message, ready for you to write. However, if you have more than one mail application installed, the wrong mail application might open up. You can fix this by changing which one is the default email application:
Go to the desktop and start typing Default Applications.
Click Default Applications.
点击 邮件 选项,选择您想用作默认的邮件客户端程序。