The Outgoing server (SMTP) %S does not seem to support encrypted passwords. If you just set up the account, try changing the 'Authentication method' in 'Account Settings | Outgoing server (SMTP)' to 'Password, transmitted insecurely'. If it used to work but now doesn't, you may be susceptible to getting your password stolen.
发件服务器（SMTP） %S 似乎不支持加密过的密码。如果您刚设置好这个账号，请尝试将“账号设置 | 发件服务器（SMTP）”中的“验证方式”更改为“不安全传输的密码”。如果这曾经可用但现在已不支持，您可能要考虑您的密码是否已被盗。