I tried to DM a Lemmy user. This URL was associated to the mail icon:
https://fedia.io/u/@Servais@discuss.tchncs.de/message
That gives a 403 forbidden. I use Tor but neither fedia nor discuss.tchncs.de are tor-hostile. So I doubt Tor is related.
I have to say apart from the above issue, fedia has been working smoothly lately. I’m glad the internal server errors that plagued the system have apparently been resolved AFAICT.
The 403 was the planned response when you tried to DM any remote user, because federation of message was just not implemented. With v1.7.0 we implemented it and you will not get a 403 anymore