Users have discovered hundreds of messages locked in a hidden inbox within Facebook’s messaging system.
The inbox, accessible on the web or Facebook Messenger apps for smartphones and tablets, is part of Facebook’s filtering system, designed to catch spam and other unwanted messages.
However, users have discovered their “filtered” inbox full of legitimate messages that never made it to the main inbox or Messenger app. The simplest way to access the inbox is to navigate to facebook.com/messages/other on the desktop.
Within the Messenger app the hidden inbox is buried under four menus. To get to it tap Settings, then People, then Message Requests and tap on the “See filtered requests” link.
The filtered messages include anything attempting to send you messages that you have manually filtered out as unwanted, as well as messages from people who are not connected with you on Facebook.
