We have already seen how to automatically launch Outlook 2010 on Windows Startup , similarly in this tutorial we are going to see the steps required to launch Mail App on Mac Startup.
Click Apple icon and select System Preferences from the menu list.
In the System Preferences window, click the Users & Groups option under System section.
In the Users & Groups window, select the username then navigate the Login items tab and click the + sign available at the bottom of the Login items list.
Now select the Mail App from the Application list and click the Add button.
Then make sure to mark the check box before the Mail App. By this way Mac users can launch Mail automatically in system startup.