奇怪的问题,.Net 2.0发送邮件失败...

.Net 1.1中发送邮件使用System.Web.Mail.而到.Net 2.0中发送邮件建议使用System.Net.Mail,不推荐使用System.Web.Mail,但是原来的还能用，今天将原来1.1发送程序改写成2.0,但是一直是发送失败，一直被诺顿拦截,很奇怪，而且把诺顿Internet Email Auto Protected关闭就能发送出去.原来1.1从来没有诺顿拦截现象.


根据上面的链接查询Symantec Support KB,解释如下:
1  Start Outlook Express. 
2  Click the Tools menu, and then click Accounts. 
3  In the Internet Accounts list, click the name of the account that you use to send email. 
4  Click Properties.
5  Click the Advanced tab.
6  Under Server Timeouts, drag the slider so that the number of minutes increases. The maximum time that you can set it to is 5 minutes.
7  Click OK. 
8  Click Close.

晕死，设置发送超时时间为 5 Min

但是将发送TimeOut设为5*60*1000仍然发送失败,搞不懂了

 1public void SendNetSmtpMail2()
 2        {
 3            System.Net.Mail.MailMessage oMsg = new System.Net.Mail.MailMessage();
 4            // Set the message sender
 5            oMsg.From = new System.Net.Mail.MailAddress("upzone@126.com", "upzone");
 6            // The .To property is a generic collection, 
 7            // so we can add as many recipients as we like.
 8            oMsg.To.Add(new System.Net.Mail.MailAddress("upzone@126.com", "upzone"));
 9            // Set the content
10            oMsg.Subject = "My First .NET email";
11            oMsg.Body = "Test body - .NET Rocks!";
12            oMsg.IsBodyHtml = true;
13            System.Net.Mail.SmtpClient oSmtp = new System.Net.Mail.SmtpClient("smtp.126.com");
14            //You can choose several delivery methods. 
15            //Here we will use direct network delivery.
16            oSmtp.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
17            oSmtp.Timeout = 5 * 60 * 1000;
18            //Some SMTP server will require that you first 
19            //authenticate against the server.
20            NetworkCredential oCredential = new NetworkCredential("upzone", "123456");
21            oSmtp.UseDefaultCredentials = false;
22            oSmtp.Credentials = oCredential;
23            //Let's send it already
24            oSmtp.Send(oMsg);
25
26        }

发送不成功,没有办法，只好改回原来1.1的发送程序,等解决了2.0的问题再说了.

 1        public void SendSmtpMail()
 2        {
 3            System.Web.Mail.MailMessage mail = new System.Web.Mail.MailMessage();
 4            mail.To = "upzone@126.com";
 5            mail.From = "upzone@126.com";
 6            mail.Subject = "this is a test email.";
 7            mail.Body = "Some text goes here";
 8            mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1"); //basic authentication 
 9            mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", "upzone"); //set your username here 
10            mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", "123456"); //set your password here 
11
12            System.Web.Mail.SmtpMail.SmtpServer = "smtp.126.com"; //your real server goes here 
13            System.Web.Mail.SmtpMail.Send(mail); 
14
15        }