Question

I am trying to send mail using SmtpClient and below is my code.

 SmtpClient client_ = new SmtpClient("relay-hosting.secureserver.net", 25);
            //client_.DeliveryMethod = SmtpDeliveryMethod.Network;
            //client_.EnableSsl = true;
           // client_.UseDefaultCredentials = false;
            //client_.Credentials = new System.Net.NetworkCredential(_fromAddress, _password);

            MailAddress from_ = new MailAddress(_fromAddress, _fromName);
            MailMessage msg_ = new MailMessage(from_, from_);

            msg_.Subject = "Subject";

            StringBuilder body_ = new StringBuilder();
            body_.AppendLine("Line1");
            body_.AppendLine("===============================================================================================");
            body_.AppendLine("Line2");
            body_.AppendLine("===============================================================================================");
            body_.AppendLine("line2");
            body_.AppendLine("===============================================================================================");

            msg_.Body = body_.ToString();
            msg_.IsBodyHtml = true;
            client_.Send(msg_);

I am getting TimeOut error. When Same smtp configuration using in email client on my machine, it send the mail immediately. I don’t know what can be cause. Also when I used my Gmail account with gmail smpt server it worked.

Answer 1

Most consumer ISPs block port 25 to prevent you from running a mail server.
Therefore, you cannot connect to port 25 from your house.

You can ask them for an alternate port.
Try port 587; it’s commonly used as well.