def send_email(recipients, subject, body='', html_body=''):

    """

    Sends an email with defined parameters from the .ini files.

    :param recipients: list of recipients, it this is empty the defined email

        address from field 'email_to' is used instead

    :param subject: subject of the mail

    :param body: body of the mail

    :param html_body: html version of body

    """

    log = get_logger(send_email)

    DBS = get_session()

    email_config = config

    subject = "%s %s" % (email_config.get('email_prefix', ''), subject)

    if not recipients:

        # if recipients are not defined we send to email_config + all admins

        admins = [u.email for u in User.query()

                  .filter(User.admin == True).all()]

        recipients = [email_config.get('email_to')] + admins

    mail_from = email_config.get('app_email_from', 'Kallithea')

    user = email_config.get('smtp_username')

    passwd = email_config.get('smtp_password')

    mail_server = email_config.get('smtp_server')

    mail_port = email_config.get('smtp_port')

    tls = str2bool(email_config.get('smtp_use_tls'))

    ssl = str2bool(email_config.get('smtp_use_ssl'))

    debug = str2bool(email_config.get('debug'))

    smtp_auth = email_config.get('smtp_auth')

    if not mail_server:

        return False

    try:

        m = SmtpMailer(mail_from, user, passwd, mail_server, smtp_auth,

                       mail_port, ssl, tls, debug=debug)

        m.send(recipients, subject, body, html_body)

    except:

        log.error('Mail sending failed')

        log.error(traceback.format_exc())

        return False

    return True

            smtp_serv.set_debuglevel(1)

        smtp_serv.ehlo()

        if self.auth:

            smtp_serv.esmtp_features["auth"] = self.auth

        # if server requires authorization you must provide login and password

        # but only if we have them

        if self.user and self.passwd:

            smtp_serv.login(self.user, self.passwd)

        smtp_serv.sendmail(msg.sender, msg.send_to, raw_msg.as_string())

        try:

            smtp_serv.quit()

        except sslerror:

            # sslerror is raised in tls connections on closing sometimes

            smtp_serv.close()

        for rec in rec_objs:

            if not email_subject:

                email_subject = NotificationModel()\

                                    .make_description(notif, show_age=False)

            type_ = type_

            email_body = None  # we set body to none, we just send HTML emails

            ## this is passed into template

            kwargs = {'subject': subject, 'body': h.rst_w_mentions(body)}

            kwargs.update(email_kwargs)

            email_body_html = EmailNotificationModel()\

                                .get_email_tmpl(type_, **kwargs)

                     email_body_html)

        return notif

    def delete(self, user, notification):

        # we don't want to remove actual notification just the assignment

        try:

            notification = self.__get_notification(notification)

            user = self._get_user(user)

            if notification and user:

                obj = UserNotification.query()\

                        .filter(UserNotification.user == user)\

        user_email = data['email']

        try:

            user = User.get_by_email(user_email)

            if user:

                log.debug('password reset user found %s' % user)

                link = url('reset_password_confirmation', key=user.api_key,

                           qualified=True)

                reg_type = EmailNotificationModel.TYPE_PASSWORD_RESET

                body = EmailNotificationModel().get_email_tmpl(reg_type,

                                                    **{'user': user.short_contact,

                                                       'reset_url': link})

                log.debug('sending email')

                         _("Password reset link"), body, body)

                log.info('send new password mail to %s' % user_email)

            else:

                log.debug("password reset email %s not found" % user_email)

        except Exception:

            log.error(traceback.format_exc())

            return False

        return True

    def reset_password(self, data):

        from kallithea.lib.celerylib import tasks, run_task

            user = User.get_by_email(user_email)

            new_passwd = auth.PasswordGenerator().gen_password(8,

                            auth.PasswordGenerator.ALPHABETS_BIG_SMALL)

            if user:

                user.password = auth.get_crypt_password(new_passwd)

                Session().add(user)

                Session().commit()

                log.info('change password for %s' % user_email)

            if new_passwd is None:

                raise Exception('unable to generate new password')

            pre_db = False

                     _('Your new password'),

                     _('Your new Kallithea password:%s') % (new_passwd,))

            log.info('send new password mail to %s' % user_email)

        except Exception:

            log.error('Failed to update user password')

            log.error(traceback.format_exc())

            if pre_db:

                # we rollback only if local db stuff fails. If it goes into

                # run_task, we're pass rollback state this wouldn't work then

                Session().rollback()