@julian@fietkau.social @paulgc@mastodon.social mm, I don't suppose there's any reason addressees and delivery recipients need align.

You can't enforce it

NodeBB does this too, where we'll send a copy of a reply to everybody in the immediate chain, even if they're not mentioned.

@glocq@mathstodon.xyz I really found this helpful:

https://seb.jambor.dev/posts/understanding-activitypub/

And testing stuff against activitypub.academy

@box464@mastodon.social whatever it is I am sure it can be built with Fedify or Emissary

@paulgc@mastodon.social nope! Replies are only received by your server if they're sent them by the person replying.

On Mastodon this usually takes the form of a mention. When a user is mentioned on Mastodon, they are de facto addressed as well.

In turn, that means the activity is delivered to those addressed users.

If a mastodon user replies to your post but does not mention you, then you will not be receiving that reply. (I think.)

@channyeintun@mastodon.social you're part of the Mastodon core team?

cc @mariusor@metalhead.club