Hi! I would like to suggest a feature that would be extremely helpful for users managing large volumes of Messenger contacts.

Currently, when a contact blocks the page or Messenger messages, we receive error #551. However, there is no built-in way to automatically unsubscribe or remove these users from future message sequences.

In my case, I manage over 100 pages, so handling this manually is not scalable. I believe having an automation trigger or system action that detects error #551 and then either:

removes the user from active sequences, or tags/unsubscribes them automatically,

would significantly improve deliverability rates and help maintain a clean contact list.

Thank you for considering this improvement!

Best regards