Still learning how this mastodon/fediverse thing works.
Now I just found out that there is something called "direct messages" and there was a question about such messages maybe being silently discarded by the instance that I'm on. That would mean, I think, that I would never know about any direct message that someone tried to send me.
If anyone would like to help me test that, please send me such a "direct message" and afterwards also reply to this in the normal way.