Configure Mail to Empty the Trash on a Schedule
If remembering to empty the trash regularly isn’t high on your priority list, you can instruct the Mail application when and how often to empty the trash for you.
To empty the Trash on a schedule, complete the following steps:
Launch the Mail application. Then, on the menu bar, select Mail > Preferences. Select the Accounts tab and click the account you want to configure in the left sidebar. Select the Mailbox Behaviors tab. Use the Erase deleted messages drop-down menu to select your preference. Choices include Never, After one day, After one week, After one month, or When quitting Mail. You have the same options for erasing junk messages if you want to include those in the purge. Close the Accounts dialog box to save your preferences.
Empty the Trash Manually
If you prefer to control when the Trash is emptied, you can do so manually and quickly.
To empty the Trash manually, complete the following steps:
Open the Mail application. In the menu bar, select Mailbox. Select Erase Deleted Items. From the context menu, select a specific mailbox, In All Accounts, or On My Mac. In the confirmation dialog box, select Erase.
Empty the Trash by Using a Keyboard Shortcut
To empty all the trash folders in Mail and permanently erase deleted messages, complete the following steps:
Open the Mail application. Verify that no mail you may need to recover is in any account’s Trash folder. On the keyboard, press Command+Shift+Del. In the confirmation dialog box, select Erase to empty the trash and purge deleted mail from all the accounts you have set up in Mail.
What’s a Hard Delete?
If you’re confident that you’ll never make a poor trash decision, you may prefer to use a hard delete with your Mail accounts. In Mail, select an email you want to delete and then press the keyboard shortcut Option+Del to delete the message and skip the trash folder entirely.
How to Restore Deleted Mail Messages
After you delete the contents of Mail’s Trash folder, the only way to recover a message is to restore it from a backup. If you use Time Machine, for example, go back to the day before you deleted the email message. Then, open Mail, locate the message, and retrieve it.
