The only settings you can restrict on F.B Messenger is not link your phone number or contacts with it. There is no longer access to your Facebook privacy setting via Facebook Messenger settings.
You will get a notification that there is a message request waiting for you, if you accept the request that person can message you or call you, if you decline they will be blocked. Anyone can put your name in Facebook Messenger search and if you have a Facebook account they can attempt to message you, by sending a “Message Request”. November 2015 Update: No more strict filtering settings for Facebook Messengerįacebook Messenger has no privacy feature to prevent non-Facebook friends from contacting you anymore. If you don’t see the answer to your question here, or in the comments below, it might be best to contact Facebook direct or check out their Messenger help FAQ’s Here: Whilst I do try to help where I can, I don’t work for Facebook and put this post out to help folks with the settings.
I’ve been overwhelmed with questions in regard to Facebook Messenger, and the settings are changing all the time.