ios mail, no validation of password
i changed my yahoo password, but ios mail is still connected to my account, without requesting the new password.
even better, i can type in any word in ios/mail/settings/yahoo/ and it still works.
so obviously there is no way to lock out someone who once find out my yahoo password.
i cannot tell who's fault this is, apple-mail or yahoo, but this is for sure a bug
iOS 9.1