This POP3 server does not seem to support encrypted passwords. If you just set up the account, please try changing to 'Password, transmitted insecurely' as the 'Authentication method' in the 'Account Settings | Server settings'. If it used to work and now suddenly fails, this is a common scenario how someone could steal your password.
这台 POP3 服务器似乎不支持加密过的密码。如果您刚设置好您的账户，请尝试修改 “账户设置 | 服务器设置”中的“验证方式” 至“不安全传输的密码”。如果之前正常，但是现在突然出错，很可能有人正在盗取您的密码。