c#和Godaddy服务器的电子邮件发送错误[重复]

Question

您好，我正在使用来自 goodaddy 的托管，mi 应用程序是用 c# 制作的，问题是发送电子邮件时，这是我的代码

 public ResponseDto sendEmail(EmailDto emailDto) {
        try
        {
            MailMessage message = new MailMessage();
            SmtpClient client = new SmtpClient();
            message.From = new MailAddress("mail@gmail.com");
            message.Subject = "have a new mail";
            message.Body = "info: \n "
                + "name: " + emailDto.Name 
                + "\mail: "+ emailDto.Email + "\nMessage: " +
                emailDto.Message;
            message.To.Add("mail@hotmail.com");
            client.EnableSsl = true;
            client.UseDefaultCredentials = false;

            client.Port = 587;
            client.Host = "smtp.gmail.com";
            client.Credentials = new System.Net.NetworkCredential("mail@gmail.com", "(password");
            client.Send(message);
        }
        catch (Exception e) {
            return new ResponseDto
            {
                message = e.ToString()
              ,
                Success = false
            };
        }

        return new ResponseDto
        {
            message = "success",
            Success = true
        };

    }

我发送邮件的邮箱是gmail，错误是下一个

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：尝试以访问权限 74.125.199.109:587 禁止的方式访问套接字在 System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress) 在 System.Net.ServicePoint.ConnectSocketInternal (Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception) --- 内部异常堆栈跟踪结束 --- 在 System.Net.PooledStream.Activate(Object owningObject 的 System.Net.ServicePoint.GetConnection(PooledStream PooledStream, Object owner, Boolean async, IPAddress& address, Socket& abortSocket, Socket& abortSocket6) , 布尔异步, GeneralAsyncDelegate asyncCallback) 在 System.Net.PooledStream.Activate(Object owningObject, GeneralAsyncDelegate asyncCallback) 在 System.Net.ConnectionPool.GetConnection(Object owningObject, GeneralAsyncDelegate e 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) --- 内部异常堆栈跟踪结束 --- 在 System.Net.Mail.SmtpClient.Send(MailMessage message) 在 Core.EmailManager.sendEmail(EmailDto emailDto)

可能是什么问题？

Answer 1

这是我的有效方法。我将在 web config 中设置用户名和密码。

 MailMessage mailMessage = new MailMessage();
 mailMessage.From = new MailAddress("mail@gmail.com", "");
 mailMessage.To.Add(userEmailAddress);
 mailMessage.Subject = subject;
 mailMessage.Body = "";
 mailMessage.IsBodyHtml = true;
 SmtpClient mailSender = new SmtpClient(ConfigurationManager.AppSettings["smtpconn"]);
await mailSender.SendMailAsync(mailMessage);

web config

  <appSetting>
   <add key="smtpconn" value="smtp.gmail.com" />
 </appSettings>
 <system.net>
<mailSettings>
  <smtp from="mail@gmail.com">
    <network host="smtp.gmail.com" port="587" userName="un" password="pw" defaultCredentials="false"/>
  </smtp>
</mailSettings>
</system.net>

Answer 2

我解决了，我希望这个aswer可以帮助别人，代码在这里：

 public ResponseDto sendEmail(EmailDto emailDto) {
        try
        {
            MailMessage message = new MailMessage();
            SmtpClient client = new SmtpClient();
            message.From = new MailAddress("mail@gmail.com");
           message.Subject = "have a new mail";
        message.Body = "info: \n "
            + "name: " + emailDto.Name 
            + "\mail: "+ emailDto.Email + "\nMessage: " +
            emailDto.Message;
            message.To.Add("mail@hotmail.com");
             client.EnableSsl = false;
             client.UseDefaultCredentials = false;
             client.Port = 25;
             client.Host = "relay-hosting.secureserver.net";
             client.Send(message);

        }
        catch (Exception e) {
            return new ResponseDto
            {
                message = e.ToString()
              ,
                Success = false
            };
        }

        return new ResponseDto
        {
            message = "success",
            Success = true
        };

    }

问题是其他中继/smtp 服务器无法在我们的主机上运行。而且我不需要指定密码。我更改了端口和主机，这是帮助我的链接

https://au.godaddy.com/community/Developer-Cloud-Portal/Unable-to-send-email-from-C-net-application-from-website/td-p/2394