trying to connect to host mail.tr158.cn, port 50, isSSL false
在javamail中出现trying to connect to host "mail.tr158.cn", port 50, isSSL false的时候，
解决方法：
1：查看你的邮件服务器配置是否正确；
2：缺少身份验证。
Session session=Session.getInstance(props, new javax.mail.Authenticator() {
protected javax.mail.PasswordAuthentication getPasswordAuthentication() {
return new javax.mail.PasswordAuthentication(username, password);
}
});