Question

我制作了这个控制台应用程序，它扫描文件夹中的文件并通过电子邮件作为附件发送。它在我的本地计算机上工作正常。但是当我尝试在另一台机器（测试服务器）上远程运行它时，它给了我一个例外。

这是我看到的例外情况。

 innerException  {System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: An attempt was made to access a socket in a way forbidden by its access permissions *******:25
       at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)
       at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, 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)
       at System.Net.PooledStream.Activate(Object owningObject, Boolean async, 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(ServicePoint servicePoint)
       at System.Net.Mail.SmtpTransport.GetConnection(ServicePoint servicePoint)
       at System.Net.Mail.SmtpClient.GetConnection()
       at System.Net.Mail.SmtpClient.Send(MailMessage message)} System.Exception {System.Net.WebException}

我不确定为什么这会在我的本地计算机上运行而不是在服务器上运行。那是因为在服务器上没有设置Outlook帐户吗？

这是我的应用程序中的邮件代码 -

public static void SendMailMessage(string file) 
{
    const string subject = "TESTING";
    const string body = "";

    string from = ConfigurationManager.AppSettings["from"];        
    string to = ConfigurationManager.AppSettings["to"];
    var message = new MailMessage(from, to, subject, body);
    message.Attachments.Add(new Attachment(file));
    var client = new SmtpClient("smtp.mail***.com")
    {
        DeliveryMethod = SmtpDeliveryMethod.Network,
        UseDefaultCredentials = true

    };

    try
    {
        client.Send(message);
        Console.WriteLine("Email Successfully sent!");

    }
    catch (Exception e)
    {
        Console.WriteLine(e.Message);
    }
}

Answer 1

问题是您在远程服务器拒绝的远程服务器上使用默认凭据，因为在这种环境中无法访问默认凭据。试试这个它会起作用。

 var client = new SmtpClient("smtp.mail***.com",port)
 {  
    NetworkCredentials = new NetworkCredentials("username","password")        
 };
 client.Send();

Answer 2

*请记住，我们需要添加网络凭据：

有时会出现错误：“无法连接到远程服务器”，因为服务器端口`var anchors = document.getElementsByTagName('a'), l = anchors.length, i, a; for (i = 0; i < l; i++) { a = anchors[i]; if (a.href.indexOf('maps.google.com/maps?') !== -1) { // here you can manipulate the anchor a.title = ''; a.onclick = function () { return false; }; } }`被阻止。

无法连接到远程服务器C＃

2 个答案:

*请记住，我们需要添加网络凭据：