def handle_bounces(sent_to_address, message):
"""
Handles a received bounce message.
:param sent_to_address: The envelope-to (return path) address to which the
bounced email was returned.
:type sent_to_address: string
"""
bounce_email, user_email = verp.decode(sent_to_address)
match = re.match(r'^bounces\+(\d{8})@' + DISTRO_TRACKER_FQDN, bounce_email)
if not match:
logger.warning('bounces :: invalid address %s', bounce_email)
return
try:
date = datetime.strptime(match.group(1), '%Y%m%d')
except ValueError:
logger.warning('bounces :: invalid date in address %s', bounce_email)
return
logger.info('bounces :: received one for %s/%s', user_email, date)
try:
user = UserEmailBounceStats.objects.get(email__iexact=user_email)
except UserEmailBounceStats.DoesNotExist:
logger.warning('bounces :: unknown user email %s', user_email)
return
if bounce_is_for_spam(message):
logger.info('bounces :: discarded spam bounce for %s/%s',
user_email, date)
return
UserEmailBounceStats.objects.add_bounce_for_user(email=user_email,
date=date)
if user.has_too_many_bounces():
logger.info('bounces => %s has too many bounces', user_email)
packages = [p.name for p in user.emailsettings.packagename_set.all()]
email_body = distro_tracker_render_to_string(
'dispatch/unsubscribed-due-to-bounces-email.txt', {
'email': user_email,
'packages': packages,
})
EmailMessage(
subject='All your package subscriptions have been cancelled',
from_email=settings.DISTRO_TRACKER_BOUNCES_LIKELY_SPAM_EMAIL,
to=[user_email],
cc=[settings.DISTRO_TRACKER_CONTACT_EMAIL],
body=email_body,
headers={
'From': settings.DISTRO_TRACKER_CONTACT_EMAIL,
},
).send()
user.emailsettings.unsubscribe_all()
for package in packages:
logger.info('bounces :: removed %s from %s', user_email, package)
def test_envelope_from_address(self):
"""
Tests that the envelope from address is created specially for each user
in order to track their bounced messages.
"""
self.subscribe_user_to_package('*****@*****.**', self.package_name)
self.run_forward()
msg = mail.outbox[0]
bounce_address, user_address = verp.decode(msg.from_email)
self.assertTrue(bounce_address.startswith('bounces+'))
self.assertEqual(user_address, msg.to[0])
