Step 1: Open the “Preferences†window.
               i) Using the menu bar at the top of the screen, click Mail, then Preferences. The preferences window will appear.
Step 2: Choose the “Account Information†screen.
               i) Click Accounts (the blue “@†sign) along the top of the window if necessary.
               ii) Click the [email protected] account in the left “Accounts†column if necessary.
               iii) Click Account Information if necessary.
Step 3: Disable "Remove copy from server".
               i) Uncheck Remove copy from server after retrieving message.
Step 4: Close the "Preferences" window and save the changes.
               i) Click the red close button in the upper-left corner of the "Preferences" window and the "Save Changes" dialog pops up, choose Save option.
