def process_mail(self, mail: Mail):
if isinstance(mail, MailMessage):
source = mail.get_source()
destination = mail.get_destination()
message = mail.get_message()
if source == banned_address or destination == banned_address:
self.__logger.warning('Detected target mail correspondence: from {0} to {1} "{2}"'.
format(source, destination, message))
else:
self.__logger.info('Usual correspondence: from {0} to {1}'.format(source, destination))
return mail
