I would like to be able to delete multiple messages in the trash instead of doing each one separately
Delete multiple messages in the trash
Danl L Wolfe shared this idea
To delete all emails in the Trash, select the box from the top and then click Delete.
To delete multiple consecutive emails:
1. In your Mailbox window, press and hold the Shift key on your keyboard, and then click the first email that you wish to delete.
2. Now, hold the Shift key down, and click the last email in the list. This will select all the emails between the first email and the last email that you have selected.
3. Click Delete.