I just started using the LaTeX community ([email protected]). Sad to see it go.
update
Just noticed it’s back up, but there are no communities. That’s bizarre. So if someone not on lemmy.sdfeu.org were to post to [email protected], I guess it’d still be like a ghost node because the post would have nowhere to go on the hosting node.
Your client would make a difference. What you are probably seeing is the mirrored version of [email protected] on lemm.ee. You cannot possibly be interacting with a non-existent community. If I post to https://linkage.ds8.zone/c/[email protected], then I don’t suppose you would see it on https://lemm.ee/c/[email protected].
(edit) just saw your test msg. Well, that’s interesting. Even though [email protected] no longer exists, it seems the mirrored versions of it can still collaborate. I’m not sure how that works.