All emails in the mailbox will be selected. Step 1 In the Mail app on your Mac, select the mailbox you want to delete all emails. If you want to remove all emails on Mac, here is a quick way to do it. If you would like to delete multiple emails received or sent on a specific date, enter the date, for example, entering 'Date: 11/13/18-11/14/18' in the search bar. It you want to delete multiple emails from the same person, type the name of the sender in the search bar to find all the emails from the sender. After selecting all the emails you want to delete, click the Delete button, then all the selected messages will be deleted. Open the Mail app on your iMac/MacBook, press and hold the Shift key and select the emails you want to delete. You have to erase the deleted emails to permanently delete them from your Mac to regain the storage space. And by clicking the Delete button, the deleted emails still remain on your Mac storage. It is easy to delete one email on Mac, however, there seems no way to delete multiple emails all altogether.

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