Dispose SmtpClient in SendComplete?

When I use SmtpClient's SendAsync to send email, how do I dispose the smtpclient instance correctly?

Let's say:

MailMessage mail = new System.Net.Mail.MailMessage()
{
   Body = MailBody.ToString(),
   IsBodyHtml = true,
   From = new MailAddress(FromEmail, FromEmailTitle),
   Subject = MailSubject
};
mail.To.Add(new MailAddress(i.Email, ""));
SmtpClient sc = new SmtpClient(SmtpServerAddress);
//Add SendAsyncCallback to SendCompleted
sc.SendCompleted += new SendCompletedEventHandler(SendAsyncCallback);
//using SmtpClient to make async send (Should I pass sc or mail into SendAsyncCallback?)
sc.SendAsync(mail, sc);

In the SendAsyncCallback method, should I call sc.Dispose(), or mail.Dispose()?

I checked MSDN document, one example calls MailMessage.Dispose(), but will this dispose method also dispose the SmtpClient instance?