Facebook has an inbox that most users don’t even know of. It is located right beside your usual Facebook inbox and is labelled the “Other” inbox. Now that you know this, the company is replacing it with a feature called “Message Requests”.
The Other inbox exists for the sole reason of keeping messages that came from people who were not your Facebook friends. So, you could have received messages from people who actually knew you or wanted to contact you for business reasons. Not to mention, someone could have found your lost item and wanted to return it to you but you never knew about it because the message went straight to the Other inbox.
Now, users will have less than 10 days to review the messages they have in the Other inbox. After that, Facebook will be replacing it with “Message Requests”.
Message Requests works in a similar fashion to the Other inbox, except that the message will actually be sent into your main Messenger inbox. This also means that you are about to receive a lot more (annoying) messages from friends of friends or even strangers. That being said, Facebook is giving you the chance to review the Facebook user, as well as having control on whether or not to receive additional messages in the future.