Delete messages (Android 2.3)
When you delete a message in the Android Gmail app, the conversation is automatically archived and added to the Trash label.
To permanently delete a conversation from the Trash label, use the Gmail web app:
- Visit m.google.com in your mobile web browser to access the Gmail web app.
- From the Inbox, touch Menu.
- Select the Trash label.
- Select the conversations you'd like to delete.
- Touch Delete forever.