Question

SMTP的发送方法总是抛出异常。消息是：发送邮件失败

这是我的代码：

MailMessage mm = new MailMessage();
mm.To.Add("Yuvraj.dhot@xxxxx.co.in");

mm.From = new MailAddress("Kumar.Chaudhari@xxxxx.co.in");
mm.Subject = "Ant Subject";
mm.Body = "Body Cha MEssag here ";

SmtpClient ss = new SmtpClient("localhost");

ss.EnableSsl = false;

try
{
    **ss.Send(mm);**
    Result.Text = "Message Sent";
    Result.ForeColor = System.Drawing.Color.Green;
}
catch (SmtpException ex)
{
    Result.Text = "Message Not Sent : \n\n " + ex.Message;
    Result.ForeColor = System.Drawing.Color.Red;
}

我也尝试过使用

ss.DeliveryMethod = SmtpDeliveryMethod.PickupDirectoryFromIis;

现在它没有抛出任何异常，它执行正常，但接收者在他的收件箱中没有收到任何邮件。

我该如何解决这个问题？

编辑 - 这是我正在获取的堆栈跟踪

    Message=Failure sending mail. Source=System StackTrace: at System.Net.Mail.SmtpClient.Send
(MailMessage message) at WebApplication1._Default.Page_Load(Object sender, EventArgs e) in D:\Emcure-
Kumar\Work\Not in Use\WebApplication1\WebApplication1\Default.aspx.cs:line 30 InnerException: 
System.Net.WebException Message=Unable to connect to the remote server Source=System StackTrace: –
    at System.Net.ServicePoint.GetConnection(PooledStream PooledStream, Object owner, Boolean async,
 IPAddress& address, Socket& abortSocket, Socket& abortSocket6, Int32 timeout) at 
System.Net.PooledStream.Activate(Object owningObject, Boolean async, Int32 timeout, 
GeneralAsyncDelegate asyncCallback) at System.Net.PooledStream.Activate(Object owningObject, 
GeneralAsyncDelegate asyncCallback) at System.Net.ConnectionPool.GetConnection(Object owningObject, 
GeneralAsyncDelegate asyncCallback, Int32 creationTimeout)
    at System.Net.Mail.SmtpConnection.GetConnection(String host, Int32 port) at 
System.Net.Mail.SmtpTransport.GetConnection(String host, Int32 port) at 
System.Net.Mail.SmtpClient.GetConnection() at System.Net.Mail.SmtpClient.Send(MailMessage message) 
InnerException: System.Net.Sockets.SocketException Message=No connection could be made because the 
target machine actively refused it 127.0.0.1:25 Source=System ErrorCode=10061 NativeErrorCode=10061

Answer 1

您的execption应包含的信息多于“发送邮件失败”

有关调试的信息，请查看此链接，了解有关SmtpClient.Send方法引发的Exeptions的详细信息 - ＆gt; SmtpClient.Send Method

此代码适用于“smtp.google.com”

        MailMessage mm = new MailMessage();
        mm.From = new MailAddress("xx");
        mm.To.Add("xx");
        mm.Subject = "Ant Subject"; 
        mm.Body = "Body Cha MEssag here ";

        SmtpClient ss = new SmtpClient();
        ss.Host="smtp.gmail.com";
        ss.Port = 587;
        ss.EnableSsl = true;

        ss.Credentials = new System.Net.NetworkCredential("xx", "xx");
        try 
        { 
            ss.Send(mm); 
            Label1.Text = "Message Sent";
            Label1.ForeColor = System.Drawing.Color.Green; 
        }
        catch (SmtpException ex) 
        { 
            Label1.Text = "Message Not Sent : \n\n " + ex.Message;
            Label1.ForeColor = System.Drawing.Color.Red;
        }

Google要求启用SSL并将端口587作为传出端口。您还需要一个Google帐户才能获得凭据。

您的代码没有任何问题 - 它很可能是您的服务器或防火墙

Answer 2

首先尝试在web.config中使用它：

  <system.net>
    <mailSettings>
      <!-- Use this setting for development
      <smtp deliveryMethod="Network">
        <network host="mail.mydomain.com" port="25" />
      </smtp>
      -->
      <smtp deliveryMethod="SpecifiedPickupDirectory">
        <specifiedPickupDirectory pickupDirectoryLocation="C:\Tmp"/>
      </smtp>
    </mailSettings>
  </system.net>

这会将所有文件复制到C：\ Tmp中。你可以像这样实例化这个类：

SmtpClient client = new SmtpClient();

然后更改web.config中的配置。试一试，如果有帮助，请告诉我们。

Answer 3

我遇到了同样的问题，并且是我的代理，我真的不知道，因为我的ie具有良好配置的代理，并且我读到C＃app获得OS代理的配置。我只是将我的锥形改为没有代理的一些并且运行得很好。所有解决方案，第1，第2和第3。也许是代理或防火墙，或尝试在其他PC上的程序来确认。我希望能帮助你。

Answer 4

试试这个

    SmtpClient smtpClient = new SmtpClient();
    MailMessage message = new MailMessage();

    try
    {
       // System.Net.Mail.MailMessage msg = new System.Net.Mail.MailMessage();
        MailAddress fromAddress = new MailAddress(txt_name.Text, txt_to.Text);


        smtpClient.Host = "smtp.gmail.com";


        smtpClient.Port = 25;

       // msg.From = new System.Net.Mail.MailAddress("xyz@gmail.com");

      message.From = fromAddress;

        message.To.Add("xyz111@gmail.com");


        message.Body = txt_des.Text;
        smtpClient.EnableSsl = true;

        System.Net.NetworkCredential NetworkCred = new System.Net.NetworkCredential();

        NetworkCred.UserName = "xyz@gmail.com";

        NetworkCred.Password = "xtz";

        smtpClient.UseDefaultCredentials = true;

        smtpClient.Credentials = NetworkCred; 


        smtpClient.Send(message);

        lblStatus.Text = "Email successfully sent.";
    }
    catch (Exception ex)
    {
        lblStatus.Text = "Send Email Failed." + ex.Message;
    }

发送电子邮件的问题

4 个答案: