Yahoo's email client is one of the best in terms of usability. The story there is that Marissa Mayer wanted employees to use it internally, so it got heavily d

Yahoo's email client is one of the best in terms of usability. The story there is that Marissa Mayer wanted employees to use it internally, so it got heavily dogfooded and improved. (Yahoo employees were using Google docs and sheets for company use like password lists. lol.) It's worked as your described above for a few years, but they claim to have made speed improvements recently (as it was unusable on low-end devices like netbooks.) The problem with Yahoo Mail is that Mayer allowed a FISA order to install a kernel-level sniffing module on email servers, and I never heard if that was removed (interpret that as a no.) In addition, their network was pwned multiple times, so there's that too. https://www.engadget.com/2016/10/08/reuters-yahoo-email-scanning-done-using-a-linux-kernel-module https://www.engadget.com/2016/10/08/reuters-yahoo-email-scan... https://www.theregister.co.uk/2017/02/16/yahoo_forged_cookie_hack_risk/ https://www.theregister.co.uk/2017/02/16/yahoo_forged_cookie... Source: ex-Yahoo, offered role as technical lead of Mail.