Sending a .EML file in C# using MailMessage with the SmtpClient

Program.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Mail;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace MailMeml
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello SMTP Eml mailer!");

            // SmtpClient client = new SmtpClient("smtp.csnet.nl");
            SmtpClient client = new SmtpClient("smtp.tele2.nl");

            int proccessedCount = 0;



            foreach (var emlFilename in Directory.GetFiles("c:\\temp\\emailsh").Skip(0))
            {
                Console.WriteLine(emlFilename);

                var fileInfo = new FileInfo(emlFilename);
                var emlFileMessage = MsgReader.Mime.Message.Load(fileInfo);

                MailMessage newMessage = new MailMessage();


                if (emlFileMessage.Headers != null)
                {
                    if (emlFileMessage.Headers.From != null)
                    {
                        newMessage.From = new MailAddress(emlFileMessage.Headers.From.Address);
                    }
                    else
                    {
                        Console.WriteLine($"Cannot process mail:{emlFilename}");
                        return;
                    }

                    if (emlFileMessage.Headers.To != null)
                    {
                        foreach (var recipient in emlFileMessage.Headers.To)
                        {
                            newMessage.To.Add(recipient.Address);
                            //for testing purpose, use your own mailaddress:  newMessage.To.Add("test@mail-to-some-domain.nl");
                        }
                    }

                    newMessage.Bcc.Add(new MailAddress("mvklingeren@intersoftware.nl"));


                    newMessage.Subject = emlFileMessage.Headers.Subject;

                    if (emlFileMessage.HtmlBody != null)
                    {
                        newMessage.IsBodyHtml = true;
                        newMessage.Body = System.Text.Encoding.UTF8.GetString(emlFileMessage.HtmlBody.Body);
                    }
                    else if (emlFileMessage.TextBody != null)
                    {
                        newMessage.Body = System.Text.Encoding.UTF8.GetString(emlFileMessage.TextBody.Body);
                    }

                    foreach (var attach in emlFileMessage.Attachments)
                    {
                        var copyAttachment = new Attachment(new MemoryStream(attach.Body), attach.FileName);
                        newMessage.Attachments.Add(copyAttachment);
                    }

                    proccessedCount++;


                    Console.WriteLine("Sending mail:");
                    Console.WriteLine($"From: {newMessage.From}");
                    Console.WriteLine($"To: {newMessage.To}");
                    Console.WriteLine($"Subject: {newMessage.Subject}");
                    Console.WriteLine($"Bericht: {newMessage.Body}");
                    Console.WriteLine($"Attachments aantal: {newMessage.Attachments.Count}");
                    Console.WriteLine($"Processed aantal: {proccessedCount}");


                    try
                    {
                        client.Send(newMessage);
                    }
                    catch (Exception ex)
                    {
                        Console.WriteLine("Exception caught: {0}",
                                    ex.ToString());
                    }


                    Thread.Sleep(1000);
                }
            }
            
            Console.ReadKey();            
        }
    }
}

Make sure to use the nuget:
https://www.nuget.org/packages/MsgReader/
https://github.com/Sicos1977/MSGReader