Chat with our AI personalities
If they say 'Inbox me!' or something like that they mean they want you to add them as a friend on facebook.
you go onto the top part of the facebook screen. it will say " Home-Profile-Friends-Inbox". you click on the Inbox and there you are, at your inbox
"Manda-me uma mensagem"
Facebook messenger does have some security issues that have people concerned but other use it and say they have no problems using it and are not concerned about it.
this might be different for you but check one of your emails from Facebook and see who sent it to you.Mine was noreply@facebookmail.com.Then,email what you need to say to Facebook.