How To Delete All The Messages From Facebook
To do this, you need to initially direct to your inbox, look for messages you wish to delete, then press on 'Settings', click on 'Report Spam or Abuse' as the picture
A little window will pop up, choose the second choice and press 'OK'.
Facebook will lets you to choose messages you want to delete. After checking messages, you will on' Mark as Spam' to delete inspected message immediately.
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