They recently changed the way our email accounts work with our ISP and I've been unable to get my parents' email accounts to play nice with the windows 10 default app. I need it to have two features.... it needs to be easy to use and I need to be able to set it to where it downloads the emails locally and deletes the server side copies automatically. I'm still using good old windows live mail, so I'm no help in terms of experiencing other programs out there.