@gruifor haha, yup ! Let’s try a non scientific test…

@indieweb.social <AT indieweb DOT social>… diff server
<AT flow DOT Earth>… this server
@flow.Earth <AT flow DOT Earth> … misspelt server
#hashtagWithEmoji😂 <hashtag with emoji>.
@Pauly … user on diff server.

I’ll come back to this on the half dozen apps I downloaded to try and work it all out ! If that makes a difference.