I installed version 15.5 today and to be honest, I'm very dissapointed. I experience a lot of bugs and a less user friendly interface. I'll share some of the problems I ran into: Email: In no single way it is possible to setup a working e-mail connection. No G-mail, no service provider mail, no mail from a private mailserver. I ruled out all firewall and authentication issues. The only error I see when testing is: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond xxx.xxx.xxx.xxx:25 . I don't have a single clue anymore. I've read other posts with similar issues, but none of them had a solution in my case. Even tried to reset the service or restart server after changing email settings, all result in no respond from host. Is there somebody with a clue?