Question

我使用此代码尝试发送电子邮件。几秒钟后，它显示一条错误消息，声称操作已超时。我该如何解决这个问题？

try
{
    MailAddress from = new MailAddress("from@yahoo.com", "name", Encoding.UTF8);
    MailAddress to = new MailAddress("to@yahoo.com");
    MailMessage message = new MailMessage(from, to);
    message.Subject = "Test";
    message.SubjectEncoding = Encoding.UTF8;
    message.Body = "Test";
    message.BodyEncoding = Encoding.UTF8;
    SmtpClient client = new SmtpClient();
    client.Host = "smtp.mail.yahoo.com";
    client.Port = 465;
    client.EnableSsl = true;
    client.Credentials = new NetworkCredential("example@yahoo.com", "Password");
    client.Send(message);
    MessageBox.Show("sending Successfully!!!");
}
catch (SmtpException ex)
{
    MessageBox.Show(ex.ToString());
}

Answer 1

您确定可以通过端口smtp.mail.yahoo.com访问465吗？听起来很像网络相关的问题。通常，当某些事情超时时，这意味着它会尝试连接到服务器一段时间，然后停止并给您一个错误。

一种简单的方法是对端口telnet上的smtp.mail.yahoo.com到465进行测试，看看它是否会超时。如果已安装，可以在Windows中使用Putty或内置telnet - 客户端。

Answer 2

根据我的理解，您的代码将无法正常工作，因为yahoo.com不会通过SMTP提供您的访问权限。为此，您需要升级到 Yahoo！ Mail Plus 。

无法从Yahoo!中找到任何类型的kb就此而言。我从雅虎获得了信息！关于How to read Yahoo! Mail Plus using Outlook Express的文章。本文的前两行非常相关。

您想阅读并发送您的Yahoo!使用Outlook Express发送电子邮件？
如果你是雅虎！您可以使用Mail Plus用户。

此外，外发SMTP服务器应为

client.Host = "plus.smtp.mail.yahoo.com";

Answer 3

我有同样的问题你必须将clietn.port设置为25，你必须在client.Credentials = new NetworkCredential（login，password）中指定你的登录密码

当我这样做时，我可以毫无问题地发送邮件

有代码

{
SmtpClient client = new SmtpClient("188.125.69.59");//you can put the ip adress or the dns of smtp server (smtp.mail.yahoo.com as exemple)
                // Specify the e-mail sender.
                // Create a mailing address that includes a UTF8 character
                // in the display name.
                MailAddress from = new MailAddress("from@yahoo.fr");
                // Set destinations for the e-mail message.
                MailAddress to = new MailAddress("to@gmail.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 ="cc";
                message.BodyEncoding =  System.Text.Encoding.UTF8;
                message.Subject = "test message 1";
                message.SubjectEncoding = System.Text.Encoding.UTF8;
                string userState = "test message1";
                MessageBox.Show("sending"); 
                client.Port = 25;
               // client.Timeout = 40000;
                client.ServicePoint.MaxIdleTime = 1;
                client.Credentials = new System.Net.NetworkCredential("from@yahoo.fr", "pass");
                //client.SendAsync(message, userState);
                client.Send(message);
                MessageBox.Show("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();
                MessageBox.Show("Goodbye.");
}

Answer 4

对域@yahoo.co.in使用以下设置。

    var smtp = new System.Net.Mail.SmtpClient();
        {
            smtp.Host ="smtp.mail.yahoo.co.in";
            smtp.Port = 25;
            smtp.EnableSsl = true;
            smtp.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
            smtp.Credentials = new NetworkCredential(fromAddress, fromPassword);
            smtp.Timeout = 20000;
        }

超时发送邮件中的错误

4 个答案: