System.Net.Mail.SmtpClient client = new SmtpClient(SmtpServer);
　　client.UseDefaultCredentials = false;
　　client.Credentials = new System.Net.NetworkCredential(UID, PWD);
　　client.DeliveryMethod = SmtpDeliveryMethod.Network;

　　System.Net.Mail.MailMessage message = new MailMessage(From,TO, Subject,Body);
　　message.BodyEncoding = System.Text.Encoding.UTF8;
　　message.IsBodyHtml = true;
　　client.Send(message);