Notifications setup issue

I tried to set-up notifications again since we stopped getting the notifications mails. However, somehow, it does not seem to work.

We use microsoft office 365 as our mail server. So accordingly I setup the appropriate fields. It at least stopped giving me java exception errors ;)

I have searched however could not find a solution.

Now I do not get any errors anymore but no mails either.

Used version of YouTrack :

Best regards,

Simon