this post was submitted on 14 Aug 2024
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ActivityPub addressing is really somewhat complex and pretty much any server is going to abstract it with things like at-mentions, sometimes making different assumptions. When I reply to lemmy posts from my microblog.pub server, I sometimes need to make sure to include both the user (@elena@lemmy.world) and community (@fediverse@lemmy.world) if they happen to be on different domains. Otherwise my server's addressing won't send it to the right place. And I doubt other lemmy instances will see this post unless I tag them too.
Thank you for the explanation! May I quote you in my (future) blog post about Lemmy?
@elena@lemmy.world @fediverse@lemmy.ml Sure, although I had forgotten that the community shares replies to, so it actually does federate out if I tag it.