如何使用CSharp和代理网络通过SMTP协议发送电子邮件？

Question

I am working in a project , In which i will be retrieving the password of the user from the database and mail it to the user email id. For this i am using SMTP protocol. But i was not able to send the mail from my application. I am using proxy network in the company in which i am working. I think using proxy network is the reason for getting error while sending the email. Is there any alternate solution for sending the email through SMTP protocol from a proxy network.

code used.

    MailMessage mm = new MailMessage("sender@gmail.com", txtEmail.Text.Trim());
        mm.Subject = "Password Recovery";
        mm.Body = string.Format("Hi {0},<br /><br />Your password is {1}.<br /><br />Thank You.", username, password);
        mm.IsBodyHtml = true;
        SmtpClient smtp = new SmtpClient();
        smtp.Host = "smtp.gmail.com";
        smtp.EnableSsl = true;
        NetworkCredential NetworkCred = new NetworkCredential();
        NetworkCred.UserName = "sender@gmail.com";
        NetworkCred.Password = "senderpassword";
        smtp.UseDefaultCredentials = true;
        smtp.Credentials = NetworkCred;
        smtp.Port = 587;
        smtp.Send(mm);
        lblMessage.ForeColor = Color.Green;
        lblMessage.Text = "Password has been sent to your email address.";

Exception image:

Answer 1

您可以设置WebRequest

    WebRequest.DefaultWebProxy = new WebProxy("127.0.0.1",8580);