发送126的邮箱失败，麻烦各位帮忙看下什么原因造成的？

[gymls2003]

MailMessage mail = new MailMessage();
mail.Body="世界你好！";
mail.BodyEncoding=System.Text.Encoding.UTF8;
mail.BodyFormat=MailFormat.Text;
mail.From="[e-mail]";
mail.To="[e-mail]";
mail.Priority = MailPriority.High;
mail.Subject = "工资发放";

mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1"); //这个好像是认证类型
mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername","aa"); //要认证的用户名
mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", "123456"); //要认证的密码

try
{
// SmtpMail.SmtpServer="smpt.126.com";
SmtpMail.SmtpServer.Insert(0,"smpt.sohu.com");
SmtpMail.Send(mail);
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
}

在事件查看器里面报这个错误：
向远程域 '126.com' 传递邮件失败。错误消息为 'An SMTP protocol error occurred.
'。 引起此错误的 SMTP 动作为 'MAIL'。远程服务器 的响应为 '553 Requested action not taken: no smtp MX only,mx13,wKjJwbCrtwf_Js1GAbxzEQ==.951S2 1187849983
'。

在[e-mail]这个油箱里面产生一个这样的错误：
Delivery Status Notification (Failure)
This is an automatically generated Delivery Status Notification.

Delivery to the following recipients failed.

[e-mail]



如果把收件人改为yahoo或者sohu的邮箱,没问题可以发出去！但对其他的有些邮箱也发不出去，比如公司的内部邮箱，其他的有些网站邮箱等，大家遇见类似的问题吗？麻烦指点一下！，谢谢！

[csShooter]

自己建一个邮箱服务器来测试！

[gymls2003]

MailMessage mail = new MailMessage();
mail.Body="世界你好！";
mail.BodyEncoding=System.Text.Encoding.UTF8;
mail.BodyFormat=MailFormat.Text;
mail.From="[e-mail]";
mail.To="[e-mail]";
mail.Priority = MailPriority.High;
mail.Subject = "工资发放";

mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1"); //这个好像是认证类型
mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername","aa"); //要认证的用户名
mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", "123456"); //要认证的密码

try
{

SmtpMail.SmtpServer.Insert(0,"smpt.126.com");
SmtpMail.Send(mail);
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
}

在事件查看器里面报这个错误：
向远程域 '126.com' 传递邮件失败。错误消息为 'An SMTP protocol error occurred.
'。 引起此错误的 SMTP 动作为 'MAIL'。远程服务器 的响应为 '553 Requested action not taken: no smtp MX only,mx13,wKjJwbCrtwf_Js1GAbxzEQ==.951S2 1187849983
'。

在[e-mail]这个油箱里面产生一个这样的错误：
Delivery Status Notification (Failure)
This is an automatically generated Delivery Status Notification.

Delivery to the following recipients failed.

[e-mail]

[mygisforum]

笔记中的一段，希望有用。

使用说明：
代码为控制台应用程序，设置步骤：新建控制台应用程序，复制、粘贴，改下的邮箱账号、密码及附件，然后定位到“项目属性——调试——启动选项——命令行参数”处，
输入 "smtp.126.com" 25。按 F5 即可到邮箱查看内容啦！

using System; 
using System.Net; 
using System.Net.Mail; 
using System.Net.Mime; 
using System.Threading; 
using System.ComponentModel; 
namespace Examples.SmptExamples.Async 
{ 
    public class SimpleAsynchronousExample 
    { 
        static bool mailSent = false; 
        private static void SendCompletedCallback(object sender, AsyncCompletedEventArgs e) 
        { 
            // Get the unique identifier for this asynchronous operation. 
            String token = (string)e.UserState; 
            if (e.Cancelled) 
            { 
                Console.WriteLine("[{0}] Send canceled.", token); 
            } 
            if (e.Error != null) 
            { 
                Console.WriteLine("[{0}] {1}", token, e.Error.ToString()); 
            } 
            else 
            { 
                Console.WriteLine("Message sent."); 
            } 
            mailSent = true; 
        } 
        public static void Main(string[] args) 
        { 
            // Command line argument must the the SMTP host. 
            SmtpClient client = new SmtpClient(args[0],Convert.ToInt32(args[1])); 
            // Specify the e-mail sender. 
            // Create a mailing address that includes a UTF8 character 
            // in the display name. 
            /* 
             * 有些 SMTP 服务器要求在代表客户端发送电子邮件之前验证客户端的身份 
             * 解决办法： 
             * 下面一行是非常关键的代码 
             */ 
            client.Credentials = new NetworkCredential("自己账号", "登陆密码"); 
            MailAddress from = new MailAddress("自己账号@126.com", 
               "Jane " + (char)0xD8 + " Clayton", 
            System.Text.Encoding.UTF8); 
            // Set destinations for the e-mail message. 
            MailAddress to = new MailAddress("对方账号@126.com"); 
           // Specify the message content. 
            MailMessage message = new MailMessage(from, to); 
            message.Body = "This is a test e-mail message sent by an application. "; 
            // Include some non-ASCII characters in body and subject. 
            string someArrows = new string(new char[] { '\u2190', '\u2191', '\u2192', '\u2193' }); 
            message.Body += Environment.NewLine + someArrows; 
            message.BodyEncoding = System.Text.Encoding.UTF8; 
            message.Subject = "test message 1" + someArrows; 
            message.SubjectEncoding = System.Text.Encoding.UTF8; 

            /* 
             * 添加附件 
             */ 
            message.Attachments.Add(new Attachment(@"e:\daemon.log")); 

            // Set the method that is called back when the send operation ends. 
            client.SendCompleted += new 
            SendCompletedEventHandler(SendCompletedCallback); 
            // The userState can be any object that allows your callback 
            // method to identify this send operation. 
            // For this example, the userToken is a string constant. 
            string userState = "test message1"; 
            client.SendAsync(message, userState); 
            Console.WriteLine("Sending message... press c to cancel mail. Press any other key to exit."); 
            string answer = Console.ReadLine(); 
            // If the user canceled the send, and mail hasn't been sent yet, 
            // then cancel the pending operation. 
            if (answer.StartsWith("c") && mailSent == false) 
            { 
                client.SendAsyncCancel(); 
            } 
            // Clean up. 
            message.Dispose(); 
            Console.WriteLine("Goodbye."); 
        } 
    } 
} 

[li365941471]

因为网易现在不行了，除非是前几年申请的邮箱。

[li365941471]

对了，补充下，新浪的邮箱是可以的。不信，你试试新浪的。