What are the limitations for the structured messages on FB messenger Gupshup August 11, 2016 05:56 Facebook imposes certain limitations on what can be done with structured messages. Go through the guidelines listed in this guide. Related articles What is welcome message in Facebook and how do I set one? How to set a custom greeting on Facebook Messenger? What is Gupshup's pricing policy? How can I Block a Spam User? Is there an API for blocking a user for sending spam messages? How to set callback URL? Comments 0 comments Please sign in to leave a comment.