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当邮件使用SMTP协议 身份认证时，如果出现
javax.mail.AuthenticationFailedException: 535 5.7.3 Authentication unsuccessful.则说明你的用户名与你的密码不正确导致验证失败！
SMTP_AUTH_Fail_Response Message
SMTP_AUTH_Fail_Response is defined as follows. This message, identified by the 535 status code, is defined in [RFC2554] section 4, and indicates that the authentication has terminated unsuccessfully because the user name or password is incorrect.
535 5.7.3 <human-readable-string><CR><LF>
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