Send Authenticated Email – Console Application

Depending on your needs I would put the email settings in an app.config file rather than in the exe but for testing this will do what it needs to.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

#region Send Authenticated Email - Using List
using System.Net.Mail;
#endregion Send Authenticated Email - Using List

namespace ConsoleApplication1
{
    class Program
    {
        #region Email Variables
        public static string sEmailSMTPServer = "<mail server IP or hostname>";
        public static string sEmailSMTPUser = "<email username>";
        public static string sEmailSMTPPassword = "<email password>";
        public static int nEmailSMTPPort = 465; // Verify correct port

        public static string sEmailFromAddress = "<email address>";
        public static string sEmailFromName = "<Name>";
        public static string sEmailToAddress = "<email address>";
        public static string sEmailToName = "<Name>";
        public static string sEmailSubject = "Test";
        public static string sEmailBody = "This is a test";
        #endregion Email Variables

        static void Main(string[] args)
        {

            MailMessage mailObj = new MailMessage();

            #region Set the message sender
            mailObj.From = new MailAddress(sEmailFromAddress, sEmailFromName);
            #endregion Set the message sender

            #region Set the message recipient(s)
            mailObj.To.Add(new MailAddress(sEmailToAddress, sEmailToName));
            //mailObj.CC.Add(new MailAddress(userName, "<Name>"));
            //mailObj.Bcc.Add(new MailAddress(userName, "<Name>"));
            #endregion Set the message recipient(s)

            #region Set the message subject
            mailObj.Subject = sEmailSubject;
            #endregion Set the message subject

            #region Set the message priority
            mailObj.Priority = MailPriority.High;
            // The email has high priority.

            // mailObj.Priority = MailPriority.Low;
            // The email has low priority.

            // mailObj.Priority = MailPriority.Normal;
            // The email has normal priority.
            #endregion Set the message priority

            #region Set the message body type
            mailObj.IsBodyHtml = true; // true or false
            #endregion Set the message body type

            #region Set the message server configuration
            SmtpClient SMTPServer = new SmtpClient(sEmailSMTPServer);
            SMTPServer.Credentials = new System.Net.NetworkCredential(sEmailSMTPUser, sEmailSMTPPassword);
            SMTPServer.UseDefaultCredentials = false;
            SMTPServer.Port = nEmailSMTPPort; // Make sure this is the correct email port
            #endregion Set the message server configuration

            try
            {
                SMTPServer.Send(mailObj);
                Console.Write("Message Sent");
            }
            catch (Exception ex)
            {
                Console.Write(ex.ToString());
            }
        }
    }
}