Some email providers have updated their security policies and require you to use an app password when signing into your email through a 3rd party app like CoinOut.
It's extra security for your account & it's easy to do!
If you need to set up an app password, a prompt will show up during the email connection process.
Follow the directions on the screen to generate an app password. Copy the password and return to the log in screen. Enter your email address & paste your app password in the password field and tap Submit.