I use the apps bluebubbles and airmessage on android to send imessages via a mac mini I have.
Test
Edit: works on my end
Without looking at the code for lemmy right now, it sounds like that’s how the instances themselves handle blocking
There’s an open pull request for this, should be implemented soon.
It’s in the backlog as of now https://github.com/aeharding/wefwef/issues/64
There’s hong to be a settings overhaul happening soon, which thus will come after
Blocking is handled on the server side at this point.
Would be best to just use the tool linked by the other commenter