look man on a special event you have to to use this code:
try
{
MailMessage mM = new MailMessage();
mM.From = new MailAddress("final_project_youssef@hotmail.com");
mM.To.Add("final_project_youssef@hotmail.com");
mM.Subject = "your subject line will go here";
mM.Body = reContactUs.Text;
mM.IsBodyHtml = true;
SmtpClient sC = new SmtpClient("smtp.live.com");
sC.Port = 25;
sC.Credentials = new NetworkCredential("your Email@hotmail.com", "password");
sC.EnableSsl = true;
sC.Send(mM);
}
catch (Exception ex)
{
throw ex;
}