Sending E-Mail (.NET 2.0)

The System.Net.Mail namespace contains all the classes required for sending mail
from within a .NET application.

The SmtpClient class handles the actual sending of e-mail. For a simple mail,
you can directly pass in the To address, from, subject, and body of the mail to
one of the SmtpClient's overloaded send methods.

Client application:

private void btnSendMail_Click(object sender, EventArgs e)
{
 MailService service = new MailService();
 string from = "some@yahoo.com";
 string to = "some@yahoo.com";
 string subject = "Sending EMails from .NET 2.0";
 string body = "Message Body";
  service.SendMail(from, to, subject, body); ;
  MessageBox.Show("Done");
}

Sending method:

public void SendMail(string from, string to,
                    string subject, string body)
{
  string mailServerName = "yoursmtpserver";
  try
  {
     //MailMessage represents the e-mail being sent
     using (MailMessage message = new MailMessage(from,
            to, subject, body))
     {
        message.IsBodyHtml = true;
        SmtpClient mailClient = new SmtpClient();
        mailClient.Host = mailServerName;
        mailClient.UseDefaultCredentials = true;
        mailClient.DeliveryMethod =
           SmtpDeliveryMethod.PickupDirectoryFromIis;
        //Send delivers the message to the mail server
  mailClient.Send(message);
     }
  }
  catch (SmtpException ex)
  {
     throw new ApplicationException
        ("SmtpException occurred: " + ex.Message);
  }
  catch (Exception ex)
  {
     throw ex;
  }
}




More information like CC,BCC, Attachments can be found at:
http://www.codeguru.com/csharp/csharp/cs_misc/e-mail/article.php/c9957__1/