Some users are definitely not receiving mail. Reason: this IP is on a dynablock (residential IP) so although I've had this IP for the past few years, some recipient servers think I'm untrustworthy.
Just brought forward the hosting plan significantly.
In the beginning (month september) I received e-mail messages when somebody posted an answer on a (by me) started topic.
Now however I don't receive e-mails any more. I consulted my spam files at my server, and indeed: all e-mails from fractal forums are considered as 'spam' by my server and moved to the spam-box.
Jules Ruis.