For me on FN 8.0.1 b4 it's running fine without any problems (see my configuration in my post above). But I must admit, I don't care of the GUI and the testmail of the GUI. For me it's important that I can send mails from a script. :)Oh Yeah! That's why it doesn't work for you!
Surfing the web I read from many sources that from release 8.0.1b3 there is some problem sending mail with TLS and SSL....
Switch back to 8.0! :D
Greets, Peter