无法建立连接，因为目标机器主动拒绝 127.0.0.1:25 说明:在执行当前 Web 请求期间发生未处理的异常。请查看堆栈跟踪以获取有关错误及其在代码中的来源的更多信息。

Exception Details: System.Net.Sockets.SocketException: No connection could be made because the target machine actively refused it 127.0.0.1:25

来源错误:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[SocketException (0x274d): No connection could be made because the target machine actively refused it 127.0.0.1:25] System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress) +239
System.Net.Sockets.Socket.InternalConnect(EndPoint remoteEP) +35
System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Int32 timeout, Exception& exception) +224

[WebException: Unable to connect to the remote server]
System.Net.ServicePoint.GetConnection(PooledStream PooledStream, Object owner, Boolean async, IPAddress& address, Socket& abortSocket, Socket& abortSocket6, Int32 timeout) +5483819
System.Net.PooledStream.Activate(Object owningObject, Boolean async, Int32 timeout, GeneralAsyncDelegate asyncCallback) +202
System.Net.PooledStream.Activate(Object owningObject, GeneralAsyncDelegate asyncCallback) +21
System.Net.ConnectionPool.GetConnection(Object owningObject, GeneralAsyncDelegate asyncCallback, Int32 creationTimeout) +332 System.Net.Mail.SmtpConnection.GetConnection(String host, Int32 port) +160
System.Net.Mail.SmtpTransport.GetConnection(String host, Int32 port) +159
System.Net.Mail.SmtpClient.GetConnection() +35 System.Net.Mail.SmtpClient.Send(MailMessage message) +1213

[SmtpException: Failure sending mail.] System.Net.Mail.SmtpClient.Send(MailMessage message) +1531
Checkout.btnSend_Click(Object sender, EventArgs e) +2675
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +111
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +110
I can't send email in live connection but in my local its working.

请大家帮帮我

System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13 System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1565

版本信息:Microsoft .NET Framework 版本:2.0.50727.3615； ASP.NET版本:2.0.50727.3618

这是我的 C# 代码..

        SmtpClient SmtpMail = new SmtpClient();
        SmtpMail.Host = "localhost";

        //delete session cookie
        Response.Cookies["session"].Expires = DateTime.Now.AddYears(-30);

        SmtpMail.Send(objEmail);

最佳答案

您忘记在那台机器上启动您的 SMTP 服务器

请不要告诉你那台机器上没有 SMTP 服务器。但是，如果你必须说出来，请引用这个 page和 this页面也

即使您配置了本地 SMTP 服务器，您的电子邮件也很可能最终进入垃圾邮件文件夹。最好使用电子邮件提供商的 SMTP 服务器。如果您使用的是 Gmail，请查看 here

关于c# - SMTP 邮件发送，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/5563229/