code: def _sendtpl(self, sender, to, subject, cc=None, bcc=None, attach=None, replyto=None, **kwargs):
          
          plain, html = self.body(**kwargs)
          self.mailer.send(sender, to, subject, plain=plain, html=html, cc=cc, bcc=bcc,
                           replyto=replyto, attach=attach)
          return
docs: Send a Letter from SENDER to TO, with the subject SUBJECT.
          Use the current template, with KWARGS as the context.
  
          Arguments:
          - `sender`: unicode
          - `to`: unicode
          - `subject`: unicode
          - `cc`: str or [str]
          - `bcc`: str or [str]
          - `replyto`: str
          - `**kwargs`: objects
  
          Return: None
          Exceptions: None