c#之发送电子邮件的问题

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; 
} 

我也试过用

ss.DeliveryMethod = SmtpDeliveryMethod.PickupDirectoryFromIis; 

现在它没有抛出任何异常，它执行正常但收件人没有在他的收件箱中收到任何邮件。

我该如何解决这个问题？

编辑 - 这是我得到的堆栈跟踪

    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 

请您参考如下方法:

您的执行应该包含比“发送邮件失败”更多的信息

要进行调试，请查看此链接以了解有关 SmtpClient.Send 方法抛出的异常的详细信息 -> 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 帐户作为凭据。

您的代码没有问题 - 很可能是您的服务器或防火墙