Apple Mail, because it's nicely integrated, just works and there's a neat GPG plugin. I have no use for webmail interfaces, I'd rather use mutt in a shell than

Apple Mail, because it's nicely integrated, just works and there's a neat GPG plugin. I have no use for webmail interfaces, I'd rather use mutt in a shell than those. Especially not Gmail, as every time I look at it, some other bullshit feature got added and the UI got more horrible.