如何使用SMTP使用ASP.net发送邮件 [英] how to send a mail using ASP.net using SMTP

问题描述

我在尝试使用带有gmail的SMTP发送邮件时遇到此错误.

无法发送电子邮件System.Net.Mail.SmtpException:发送邮件失败. ---> System.Net.WebException:无法连接到远程服务器---> System.Net.Sockets.SocketException:无法建立连接，因为目标计算机在System.Net.Sockets.Socket的System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot，SocketAddress socketAddress)处主动拒绝了它74.125.127.108:25 System.Net.ServicePoint.ConnectSocketInternal上的.InternalConnect(Endpoint remoteEP)(布尔connectFailure，Socket s4，Socket s6，Socket&套接字，IPAddress&地址，ConnectSocketState状态，IAsyncResult asyncResult，Int32超时，Exception&异常)-结束内部异常堆栈跟踪---在System.Net.PooledStream.Activate(Object System.Net.PooledStream.Activate处的owningObject，布尔异步，Int32超时，GeneralAsyncDelegate asyncCallback)(System.Net.ConnectionPool.GetCo处的ObjectowningObject，GeneralAsyncDelegate asyncCallback) System.Net.Mail.SmtpConnection.GetConnection(字符串主机，Int32端口)的System.Net.Mail.SmtpTransport.GetConnection(字符串主机，Int32端口)的nnection(Object owningObject，GeneralAsyncDelegate asyncCallback，Int32 creationTimeout) System.Net.Mail.SmtpClient.Send(MailMessage消息)的Mail.SmtpClient.GetConnection()---内部异常堆栈跟踪的末尾--- WebApplication3的System.Net.Mail.SmtpClient.Send(MailMessage消息) C:\ Documents and Settings \ Noah Soft \ My Documents \ Visual Studio 2008 \ Projects \ WebApplication3 \ WebApplication3 \ WebForm1.aspx.cs:line 42中的WebForm1.Page_Load(对象发送者，EventArgs e):第42 

CAN ANY1可以帮忙吗

解决方案

阅读此线程，
http://stackoverflow.com/questions/6611324/send-mail-using-gmail-smtp [^ ]
并参考这篇文章
http://www. shabdar.org/asp-net/111-send-email-from-your-gmail-account-using-aspnet-and-c.html [

Im getting this error on trying to send mail using SMTP with gmail.

The email cannot be sent  System.Net.Mail.SmtpException: Failure sending mail. ---> System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: No connection could be made because the target machine actively refused it 74.125.127.108:25 at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress) at System.Net.Sockets.Socket.InternalConnect(EndPoint remoteEP) at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Int32 timeout, Exception& exception) --- End of inner exception stack trace --- 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) --- End of inner exception stack trace --- at System.Net.Mail.SmtpClient.Send(MailMessage message) at WebApplication3.WebForm1.Page_Load(Object sender, EventArgs e) in C:\Documents and Settings\Noah Soft\My Documents\Visual Studio 2008\Projects\WebApplication3\WebApplication3\WebForm1.aspx.cs:line 42 

CAN ANY1 HELP THIS

解决方案

Read this thread,
http://stackoverflow.com/questions/6611324/send-mail-using-gmail-smtp[^]
and refer this article
http://www.shabdar.org/asp-net/111-send-email-from-your-gmail-account-using-aspnet-and-c.html[^]

SmtpClient client = new SmtpClient();
      client.DeliveryMethod = SmtpDeliveryMethod.Network;
      client.EnableSsl = true;
      client.Host = "smtp.gmail.com";
      client.Port = 587;

      // setup Smtp authentication
      System.Net.NetworkCredential credentials =
          new System.Net.NetworkCredential("[e-mail]", "gmailpassword");
      client.UseDefaultCredentials = false;
      client.Credentials = credentials;

      MailMessage msg = new MailMessage();
      msg.From = new MailAddress("[e-mail]");
      msg.To.Add(new MailAddress("[e-mail]"));
      msg.Subject = "This is a test Email subject";
      msg.IsBodyHtml = true;
      msg.Body = string.Format("<html><head></head><body>Test HTML Email</body>");
      try
      {
          client.Send(msg);
          //lblMsg.Text = "Your message has been successfully sent.";
      }

      catch (Exception ex)
      {
          //lblMsg.ForeColor = Color.Red;
          //lblMsg.Text = "Error occured while sending your message." + ex.Message;

      }

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