def METHOD_NAME(abstract):
    """Send abstract notification e-mails.
    :param abstract: the abstract that is going to be checked
                     against the event's notification rules
    :return: whether an email has been sent
    """
    sent = False
    for email_tpl in abstract.event.abstract_email_templates:
        matched = False
        for rule in email_tpl.rules:
            if check_rule('abstract-notifications', rule, abstract=abstract, event=abstract.event):
                matched = True
                to_recipients = []
                if email_tpl.include_submitter:
                    to_recipients.append(abstract.submitter.email)
                if email_tpl.include_authors:
                    to_recipients += [author.email for author in abstract.primary_authors]
                cc_recipients = list(email_tpl.extra_cc_emails)
                if email_tpl.include_coauthors:
                    cc_recipients += [author.email for author in abstract.secondary_authors]
                tpl = get_abstract_notification_tpl_module(email_tpl, abstract)
                email = make_email(to_list=to_recipients, cc_list=cc_recipients,
                                   reply_address=email_tpl.reply_to_address, template=tpl)
                send_email(email, abstract.event, 'Abstracts', session.user)
                abstract.email_logs.append(AbstractEmailLogEntry.create_from_email(email, email_tpl=email_tpl,
                                                                                   user=session.user))
                sent = True
        if email_tpl.stop_on_match and matched:
            break
    return sent