using MailKit.Net.Smtp;

using MimeKit;

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

​

namespace EmailTest

{

  public partial class Form1 : Form

  {

    public Form1()

    {

      InitializeComponent();

​

    }

​

    private void button1_Click(object sender, EventArgs e)

    {

      try

      {

        var message = new MimeMessage();

        message.From.Add(new MailboxAddress("ALERT", "removed@email.com"));

        message.To.Add(new MailboxAddress("RECIPIENT", "removed2.g@email.com"));

​

        message.Subject = "MailKit Test App";

        message.Body = new TextPart("plain")

        {

          Text = "This is a test"

        };

​

​

        using (var client = new SmtpClient())

        {

          // For demo-purposes, accept all SSL certificates (in case the server supports STARTTLS)

          client.ServerCertificateValidationCallback = (s, c, h, e) => true;

          var port = checkBox1.Checked ? 465 : 25;

          client.Connect("exhangeserveraddress.com", port, checkBox1.Checked);

​

          // Note: only needed if the SMTP server requires authentication

          client.AuthenticationMechanisms.Remove("XOAUTH2");

          client.Authenticate("email@example.org", "apassword");

​

          client.Send(message);

          client.Disconnect(true);

        }

      }

      catch (Exception ex)

      {

        listView1.Items.Add(ex.ToString());

      }

    }

​

    private void listView1_MouseDoubleClick(object sender, MouseEventArgs e)

    {

      Clipboard.SetText(listView1.SelectedItems[0].Text);

    }

  }

}

​