How to Mass Delete Emails in Apple Mail?

To mass delete emails in Apple Mail on macOS, follow these steps:

On Your Mac Using Apple Mail:

1. Open the Mail app on your Mac.

2. Select the emails or email conversations you wish to delete either individually or in bulk.

   • To select individual emails, click each email's header.
   • To select multiple emails, click and hold the mouse while selecting the range of emails. Alternatively, you can press and hold the Command key and click each email separately.
   • To select all emails in a conversation thread, click anywhere inside the conversation and press Control + A.
   • To select all emails in a folder, press Command + A while in the folder.

3. Once the emails are selected, you can delete them in several ways:

   • Press the Delete key on your keyboard.
   • Right-click (or control-click) the selected emails and choose 'Delete'.
   • From the Mail toolbar, click the 'Delete' button.

4. To delete a mailbox containing all its messages, simply delete the entire mailbox:

   • In the Mail app, navigate to the mailbox you want to delete.
   • Click the mailbox's name to highlight it, then press the Delete key on your keyboard.
   • Confirm the action when prompted.

For permanent deletion, ensure that the 'Remove deleted messages' option is set appropriately under Preferences -> Accounts -> Mailbox Behaviors. This ensures that deleted emails are not kept in the Trash mailbox for recovery purposes.

On iPhone or iPad Using Apple Mail:

1. Open the Mail app on your device.
2. Navigate to the email list.
3. To delete individual emails:
   • Swipe left on an email and choose 'Trash' from the menu.
   • Long-press an email and choose 'Trash.'
4. To delete multiple emails:
   • Select the emails you want to delete, then tap 'Trash' from the bottom row of icons above the email list.

Remember that deleted emails may still reside temporarily in the Trash mailbox unless configured otherwise in the Mail settings. To permanently delete emails immediately upon deletion, adjust the settings accordingly in Settings -> Mail -> Accounts -> Mailbox Behaviors.

Please note that the instructions provided assume you are referring to Apple Mail applications on macOS and iOS platforms.