sendMail

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net.Mail;
using System.IO;
using System.Net;
using System.Security.Cryptography.X509Certificates;
using System.Net.Security;

namespace ms_web.Library
{
    class MailGenerator
    {
        public string host;
        public int port;
        public string sender;

        public MailGenerator()
        {
            host = "10.1.0.9";
            port = 25;
            sender = "noreply.hrp@tsh.ssbshoes.com";

            ServicePointManager.ServerCertificateValidationCallback = delegate (object s, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
            { return true; };
        }


        public void send(string subject, string body, string[] receivers, string[] cc, string[] file)
        {
            MailMessage message = new MailMessage();

            foreach (string email in receivers)
            {
                message.To.Add(email);
            }

            foreach (string email in cc)
            {
                message.CC.Add(email);
            }

            message.From = new MailAddress(sender);
            message.Subject = subject;
            message.Body = body;
            message.IsBodyHtml = true;

            if (file.Length > 0)
            {
                foreach (var item in file)
                {
                    Attachment attachment = new Attachment(item);
                    message.Attachments.Add(attachment);
                }
            }
            executeMail(message);
        }

        private void executeMail(MailMessage message)
        {
            SmtpClient client = new SmtpClient(host, port);

            try
            {
                client.UseDefaultCredentials = false;
                client.Credentials = new NetworkCredential("tsh\'restu.adi", "p@55w0rd");
                //client.EnableSsl = true;
                client.Send(message);
            }
            catch (SmtpException ex)
            {
                string msg = ex.Message;

                if (ex.InnerException != null)
                {
                    msg += "\n" + ex.InnerException.Message;
                }
            }
        }
    }
}