code: def _smtp_server(self):
          
  
          if self._use_ssl:
              server = smtplib.SMTP_SSL(**self._smtp_vars)
          else:
              server = smtplib.SMTP(**self._smtp_vars)
  
          if self._use_tls:
              server.starttls()
  
          if self._credentials is not None:
              passwd = self._credentials[1]
              if passwd is None:
                  passwd = self._interface.input( \
                      'Password for %s' % (self._credentials[0],), no_echo=True)
              server.login(*self._credentials)
  
              # if we succeeded, cache the password
              self._credentials = (self._credentials[0], passwd)
  
          return server
docs: Return a smtplib SMTP object correctly initialised and connected to
          a SMTP server suitable for sending email on behalf of the user.