def METHOD_NAME(self):
    """Very simple envelope with a To, From, Subject, and body."""
    headers = {
        'From': 'foo@example.com',
        'To': 'bar@example.com',
        'Subject': 'Test email',
    }
    e = envelope.Envelope(account=test_account,
                          headers={k: [v] for k, v in headers.items()},
                          bodytext='Test')
    self._test_mail(e)