Delete and Move
Delete: Select single or multiple mails, click Delete on the tool bar or click Message on the menu bar then select Delete to delete selected mails. The deleted mails are moved to Trash Box.
If you want to delete the selected mails directly but not move them to Trash Box, please press Shift+Del delete them
Move: Select single or multiple mails, click Message on then menu bar, then select Transfer to move the selected mail to other mail box, or and drag and drop the selected mails to other mail box.