Mail Sending

private void sendemail()
  {
 
  string Email = email.Text;
  string MailSub = "Registration Information.";
 
  string EventDescription = "  Your Email" + Email + ",
";

  MailMessage mMailMessage = new MailMessage();
 

  mMailMessage.From = new MailAddress("[email protected]");
  mMailMessage.To.Add(new MailAddress(Email));
  mMailMessage.Subject = "Password Information.";
  mMailMessage.Body = EventDescription;
  mMailMessage.IsBodyHtml = true;

  SmtpClient client = new SmtpClient("smtp.gmail.com", 587);
  client.EnableSsl = true; //ssl must be enabled for Gmail
  //our Gmail account credentials
  NetworkCredential credentials = new NetworkCredential("[email protected]", "password");
  //add credentials to our smtp client
  client.Credentials = credentials;

  client.Send(mMailMessage);
  Page.RegisterStartupScript("onclick", "");
  }
 

HInt:

1.   string Email = email.Text; this is the to address mail id. i am getting this from text box.

email.Text---> textbox id

2. gmail  port 587 . your using other mail domain means use that port number.

this is only the mail sending function. you call this function inside of send mail button click event.