What about the emails?!
The email notification seems to be still broken.
No matter the chosen option about notifications (no mails / with every change / daily summary), no email about any changes or about private messages (with the send email option activated) are being received by the users email adress. Not even by @mail.riseup.org adresses, so we can rule out the spam filter, I guess.
This seems to be an issue for a long time, I was able to track down complaints and tickets about this at various outdated crabgrass repositories from years ago.
In the same time it's a serious cutback for the usability, since users have to consciously log in at crabgrass to get informed about any activity.
Still there doesn't seem to be a ticket about the issue here. So I decided to open this one.