Comment 1 for bug 983983

If I'm reading the code right bzr-email uses bzrlib/smtp_connection.py

The relevant code snippets from bzr-email:

    _smtplib_implementation = SMTPConnection

        smtp = self._smtplib_implementation(self.config)
        if diff:
            smtp.send_text_and_attachment_email(from_addr, to_addrs,
                                                subject, body, diff,
                                                self.diff_filename(),
                                                self.extra_headers())

I do not see the send_text_and_attachment_email method in bzrlib/smtp_connection.py the only method I see about sending stuff is send_email(self, message):