.net - 在 .NET 中通过 GMail 发送电子邮件

Question

这个问题已经有答案了:

已关闭 13 年前。

Possible Duplicate:
GMail SMTP via C# .Net errors on all ports

当我尝试在 C# 程序中发送电子邮件时，出现以下错误。我在 Windows 7 上使用 Visual Studio 2008。我会先粘贴我的代码，然后粘贴错误:

class email_log_files
    {

          private string login_username = "my_gmail_id";
          private string login_password = "my_gmail_password";

          public void send_email()
          {
              string src_address = "my_gmail_id@gmail.com";
              string dest_address = "my_destination_id@xyz.edu";


              try
              {
                  MailMessage email_msg = new MailMessage();

                  SmtpClient email_client = new SmtpClient();
                  email_msg.From = new MailAddress(src_address);
                  email_msg.Sender = new MailAddress(src_address);
                  email_msg.ReplyTo = new MailAddress(src_address);
                  email_msg.To.Add(dest_address);
                  email_msg.Subject = "Test";
                  email_msg.Body = "Body of the message";
                  NetworkCredential credentials = new NetworkCredential(login_username, login_password);


                  email_client.Credentials = credentials;
                  email_client.Host = "smtp.gmail.com";
                  email_client.Port = 465;
                  email_client.EnableSsl = true;


                  email_client.Send(email_msg);
                  Console.WriteLine("Message Sent Successfully!!");
                  Console.ReadLine();

            }

        }
    }

错误信息如下:

The operation has timed out.

为什么总是超时？我确信我有正确的 Gmail 服务器地址和端口号，因为我已经配置了相同的 Outlook。有什么帮助或想法吗？

将端口改为587后，错误如下。我刚刚禁用了防火墙，看看这是否是问题所在，但事实并非如此。新错误(针对端口 587):

这就是我将端口更改为 587 时出现的错误:

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 74.125.113.109:587

   at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddre
ss socketAddress)

   at System.Net.Sockets.Socket.InternalConnect(EndPoint remoteEP)

   at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Sock
et 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 ow
ner, Boolean async, IPAddress& address, Socket& abortSocket, Socket& abortSocket
6, 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, GeneralAsyncD
elegate 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)
System

System.Collections.ListDictionaryInternal

谢谢，副总裁

Answer 1

这是您的端口...Gmail 需要端口 587。

如果这不起作用，我可以为您提供我的电子邮件类(class)。

编辑:

   private static void SendEmailMessageGmail(System.Net.Mail.MailMessage message)
    {
        message.IsBodyHtml = true;
        message.BodyEncoding = Encoding.UTF8;
        System.Net.NetworkCredential cred = new System.Net.NetworkCredential(EmailUsername, EmailPassword);
        SmtpClient smtp = new SmtpClient("smtp.gmail.com");
        smtp.UseDefaultCredentials = false;
        smtp.EnableSsl = true;
        smtp.Credentials = cred;
        smtp.Port = 587;
        smtp.Send(message);
    }

编辑:将此添加到您的代码中:email_client.UseDefaultCredentials = false;