using System.Net;
using System.Net.Mail;
class Program {
   static void Main() {
      SmtpClient client = new SmtpClient("smtp.myserver.fr",25);
      client.Credentials = new 
         NetworkCredential( "patrick.smacchia@myserver.fr", "mypwd" );
      client.Send( "patrick@smacchia.com", "target@xyz.com", 
                   "my subject", "my body");
   }
}