When the emails get deleted from Mac Outlook application, that mails get saved in the folder "Deleted items" . Day by day, the size of folder increases and affects the overall performance of Mac Outlook 2011. To fix the issue, you have to delete the mails from Deleted items folder. Mac Outlook 2011 offers a solution to automatically empty deleted items Outlook 2011 Mac when Outlook is closed. Follow the below steps –
Solve this query by chasing the below steps:
Now Close the Outlook 2011 application , a message will appear on the screen and will ask for Do you want to delete items from Deleted Item Folder. Make a check on “Don't show this message again”. Next time, When you close the Outlook, the items of Trash folder will be removed automatically.
Any of the two solutions can resolve the query "automatically empty trash Mac Outlook".