Send a Message to All Fans of a Facebook Page

[CaddyBou]

Hello guys, i am receiving messages from a page with 300k+ likes ( the page is verified don't know if it helps ) without ever sending them something , so i guess they are making a mass message to their facebook page fans , which means the ones who liked their page ( 300k+ people ) . I searched on google how to do it and i found out a way but it could work only back in 2015 , in few words it doesn't work anymore because there is no such an option anymore ("Send an Update") . I am really curious if anyone here knows how to do and he is able to share it with us too.