jmail发不出邮件，大家急救啊

//MessageClass email = new MessageClass();
jmail.Message email = new jmail.MessageClass();
email.Logging = true;
email.Silent = true;
//email.MailServerUserName = "malnm" ;
//email.MailServerPassWord = "111";
email.From = strEmail ;
email.FromName = strName;
email.ReplyTo = "[email protected]";
email.Subject = strTitle ;
//email.AddAttachment("c:\\test.xml",true,"");
email.Body = strContent ;
email.AddRecipient("[email protected]", "来自Jmail", null);
email.Send("smtp.163.com", false);
email.Close() ;