How do delete mail from Apple Watch

Delete, mark as unread or read, or flag a message

Open the Mail app  on your Apple Watch, open a mail message, then scroll to the bottom to:

• Delete a message: Tap Trash Message.
• If you’re looking at the message list, swipe left on the message, then tap .
• Mark a message unread or read: Tap “Mark as Unread” or “Mark as Read.”
• If you’re looking at the message list, swipe right on the message, then tap the Read or Unread button.
• Flag a message: Tap Flag. (You can also unflag a message that’s already been flagged.)
• If you’re looking at the message list, swipe left on the message, then tap .

If you swipe on a message thread, the action you choose (Trash, Flag, Read, or Unread) applies to the entire thread.