Facebook explains that all the messages you exchange with your friends will go to the inbox, that is, all conversations (even those in the chat) will be saved.
Perhaps what is bothering users the most is that chat conversations are automatically recorded. Unfortunately there is no way to configure anything so that this does not happen, the idea of FB is precisely that we have a history of all the conversations in one place.All the messages you've exchanged with each friend form a single conversation. Check your Facebook messages, chat and SMS in the same place. Focus on your friends' messages.
To also include email, activate your Facebook email address (optional).
Control who can send you messages with your privacy settings.
You don't need the subject field or other formalities.
Easily abandon long conversations that no longer interest you.
Messages from unknown senders and those received as part of bulk mailings are saved in the "Other" folder. Junk mail (spam) is automatically hidden.
It also loses the possibility of sending different private messages to the same friend, since we no longer have the possibility of adding a title to the message we write.
Source: MasFB
