I'm on Exchange online (~5$ per user/month) and rather happy. The Outlook Web App online interface is regularly updated, I can use a custom domain, have plenty

I'm on Exchange online (~5$ per user/month) and rather happy. The Outlook Web App online interface is regularly updated, I can use a custom domain, have plenty of storage and adding my wife as well as alternate domains was rather easy. Add to that support for shared calendars and great support for push features (using Exchange Active Sync) on almost all systems. The main problem is that it is Microsoft and thus rather complicated: I now have a private Microsoft 'work' account for Exchange Online + a private Microsoft 'home' account for Office 365 Home Edition. So when I want to log into the online services (Mail, OneDrive, etc) I always have to think twice about which login to use :-(