Slack API message.im event is not triggered for other users
问题 I am trying to make my app watch for every kind of messages (public/private channels and direct messages) using event subscriptions, no bot. I made my app subscribe to message.channels , message.groups , message.im and message.mpim events. I've setup an endpoint URL with the challenge parameter, and I've authorized and deployed my app. I'm successfully notified when : A message is posted in a public channel A message is posted in a private channel (even if my personal account is not invited