发送邮件不成功

Question

MailMessage message = new MailMessage();
message.BodyFormat = MailFormat.Text;
message.From = "+ssurl+";
message.To = GM_EMAIL.Text.Trim();
message.Subject = "回复邮件";
message.Body = txtCONTENT;
SmtpMail.SmtpServer = "mail.163.com";
message.Fields["http://schemas.microsoft.com/cdo/configuration/sendusing"] = 2;//smil
message.Fields["http://schemas.microsoft.com/cdo/configuration/smtpauthenticate"]=1;
message.Fields["http://schemas.microsoft.com/cdo/configuration/sendusername"]="whr";
message.Fields["http://schemas.microsoft.com/cdo/configuration/sendpassword"]="1979";
try
{
    SmtpMail.Send(message);
}
catch(Exception ex)
{
    Error = ex.Message;
}
发送邮件就是不成功，什么原因呢
提示错误是未能访问cdo.message对象

Answer 1

MailMessage message = new MailMessage();
message.BodyFormat = MailFormat.Text;
message.From = "+ssurl+";
message.To = GM_EMAIL.Text.Trim();
message.Subject = "回复邮件";
message.Body = txtCONTENT;
SmtpMail.SmtpServer = "mail.163.com";
message.Fields["http://schemas.microsoft.com/cdo/configuration/sendusername"]="whr";
message.Fields["http://schemas.microsoft.com/cdo/configuration/sendpassword"]="1979";
try
{
    SmtpMail.Send(message);
}
catch(Exception ex)
{
    Error = ex.Message;
}

Answer 2

message.Fields["http://schemas.microsoft.com/cdo/configuration/sendusing"] = 2;//smill
这个可以不要吧
我看过的一本书上的例子是没有这句话的，或者你试用sina的试一试 
用163的可能会有错误

Answer 3

SmtpMail.SmtpServer = "stmp.163.com"吧

Answer 4

try
http://www.codeproject.com/useritems/SendMailUsingGmailAccount.asp
more
http://systemwebmail.com/
http://www.systemnetmail.com/