Sending mail through exchange server using SMTPClient not saving email in the sent items folder.

hi, I'm sending emails through exchange server 2007 using below code. It sends the email successfully but does not save a copy of the email into the [Sent Items] folder:

System.Net.Mail.SmtpClient client = new System.Net.Mail.SmtpClient("mydomainserver");
           client.Credentials = new System.Net.NetworkCredential("userid", "password", "domain");
           System.Net.Mail.MailMessage mail = new System.Net.Mail.MailMessage();
           mail.From = new System.Net.Mail.MailAddress("abc@mydomain.com");
           mail.To.Add("abc@xyz.com");
           mail.Subject = "test subject";
           mail.IsBodyHtml = true;
           mail.Body = "test body";

           client.Send(mail);

Can anyone please let me know what I should do to store a copy of each email sent using this code into [Sent Items] folder?

Thanks in advance...

-Jahedur Rahman