using System;

using System.Net;

using System.Net.Mail;

​

public class Program

{

    public static void Main()

    {

        // in the beginning of the file

        MailAddress to = new MailAddress("mdzubair.cse@gmail.com");

        MailAddress from = new MailAddress("dev.zubaircse@gmail.com");

        MailMessage message = new MailMessage(from, to);

        message.Subject = "Good morning, Elizabeth";

        message.Body = "Elizabeth, Long time no talk. Would you be up for lunch in Soho on Monday? I'm paying.;";

        SmtpClient client = new SmtpClient("smtp.server.address", 2525)

        {Credentials = new NetworkCredential("smtp_username", "smtp_password"), EnableSsl = true};

        // code in brackets above needed if authentication required

        try

        {

            client.Send(message);

        }

        catch (SmtpException ex)

        {

            Console.WriteLine(ex.ToString());

        }

    }

}