#!/usr/bin/env python
# -*- coding: utf-8 -*-
#***************************************************************************
-#* Copyright (C) 2003-2013 Polytechnique.org *
+#* Copyright (C) 2003-2014 Polytechnique.org *
#* http://opensource.polytechnique.org/ *
#* *
#* This program is free software; you can redistribute it and/or modify *
_recipient_re = re.compile(r'^rfc822; ?(.+)$', re.I | re.U)
+# Some MTA set the Final-Recipient with "LOCAL;" instead of "rfc822;"
+_recipient_re2 = re.compile(r'^local; ?(.+)$', re.I | re.U)
def findAddressInBounce(bounce):
print('! Not a valid bounce (expected at least 2 parts, found %d).' % num_payloads)
return None
status = bounce.get_payload(1)
+
+ # If the second part is of type "message/rfc822" it is the undelivered message.
+ # Let's try to understand the text part
+ if status.get_content_type() == 'message/rfc822':
+ text_bounce = bounce.get_payload(0)
+ if text_bounce.get_content_type() == 'text/plain':
+ return findAddressInPlainBounce(text_bounce, bounce)
+ # If it's not a text message, let's continue to the next error message
+
if status.get_content_type() != 'message/delivery-status':
print('! Not a valid bounce (expected message/delivery-status, found %s).' % status.get_content_type())
return None
print('! Not a valid bounce (expected text/plain, found %s).' % content.get_content_type())
return None
# Extract the faulty email address
- recipient_match = _recipient_re.search(content['Final-Recipient'])
- if recipient_match is None:
- print('! Missing final recipient.')
+ # Some MTA don't set Final-Recipient but use Remote-Recipient instead
+ if 'Final-Recipient' in content:
+ final_recipient = content['Final-Recipient']
+ elif 'Remote-Recipient' in content:
+ final_recipient = content['Remote-Recipient']
+ else:
+ print('! Not a valid bounce (no Final-Recipient).')
return None
+ recipient_match = _recipient_re.search(final_recipient)
+ if recipient_match is None:
+ # Be nice, test another regexp
+ recipient_match = _recipient_re2.search(final_recipient)
+ if recipient_match is None:
+ print('! Missing final recipient.')
+ return None
email = recipient_match.group(1)
# Check the action field
- if content['Action'].lower() != 'failed':
+ if content['Action'].lower().strip() != 'failed':
print('! Not a failed action (%s).' % content['Action'])
return None
+
+ status = content['Status']
+ diag_code = content['Diagnostic-Code']
+
+ # Permanent failure state
+ if int(status[:1]) == 5:
+ return email
+
# Mail forwarding loops, DNS errors and connection timeouts cause X-Postfix errors
- # Otherwise, the first sub-field should indicate a permanent failure
- postfix_error = content['Diagnostic-Code'] is not None \
- and content['Diagnostic-Code'].startswith('X-Postfix')
- if not postfix_error and int(content['Status'][:1]) != 5:
- print('! Not a permanent failure status (%s).' % content['Status'])
+ if diag_code is not None and diag_code.startswith('X-Postfix'):
+ return email
+
+ failure_hints = [
+ "insufficient system storage",
+ "mailbox full",
+ "mailbox recipient does not have a mailbox database",
+ "over quota",
+ "requested action aborted: local error in processing",
+ "user unknown",
+ ]
+ if 'quota' in status.lower():
+ return email
+ if diag_code is not None:
+ ldiag_code = diag_code.lower()
+ if any(hint in ldiag_code for hint in failure_hints):
+ return email
+
+ print('! Not a permanent failure status (%s).' % status)
+ if diag_code is not None:
+ print('! Diagnostic code was: %s' % diag_code)
+ return None
+
+
+def findAddressInWeirdDeliveryStatus(message):
+ """Finds the faulty email address in the delivery-status part of an email
+
+ Unlikely to findAddressInBounce, the status does NOT follow RFC 1894, so
+ try to learn to get data nevertheless...
+ Returns None or the email address.
+ """
+ if message.get_content_type() != 'message/delivery-status':
+ print('! Not a valid weird bounce (expected message/delivery-status, found %s).' % message.get_content_type())
+ return None
+ # The per-message-fields don't matter here, get only the per-recipient-fields
+ num_payloads = len(message.get_payload())
+ if num_payloads < 2:
+ print('! Not a valid weird bounce (expected at least 2 parts, found %d).' % num_payloads)
+ return None
+ content = message.get_payload(1)
+ # The content may be missing, but interesting headers still present in the first payload...
+ if not content:
+ content = message.get_payload(0)
+ if 'Action' not in content:
+ print('! Not a valid weird bounce (unable to find content).')
+ return None
+ elif content.get_content_type() != 'text/plain':
+ print('! Not a valid weird bounce (expected text/plain, found %s).' % content.get_content_type())
+ return None
+
+ # Extract the faulty email address
+ if 'Final-Recipient' in content:
+ recipient_match = _recipient_re.search(content['Final-Recipient'])
+ if recipient_match is None:
+ # Be nice, test another regexp
+ recipient_match = _recipient_re2.search(content['Final-Recipient'])
+ if recipient_match is None:
+ print('! Unknown final recipient in weird bounce.')
+ return None
+ email = recipient_match.group(1)
+ elif 'Original-Recipient' in content:
+ recipient = content['Original-Recipient']
+ recipient_match = _recipient_re.search(recipient)
+ if recipient_match is None:
+ # Be nice, test another regexp
+ recipient_match = _recipient_re2.search(recipient)
+ if recipient_match is None:
+ recipient_match = re.match(r'<([^>]+@[^@>]+)>', recipient)
+ if recipient_match is None:
+ print('! Unknown original recipient in weird bounce.')
+ return None
+ email = recipient_match.group(1)
+ else:
+ print('! Missing recipient in weird bounce.')
return None
- return email
+ # Check the action field
+ if content['Action'].lower() != 'failed':
+ print('! Not a failed action (%s).' % content['Action'])
+ return None
-def findAddressInPlainBounce(bounce):
+ status = content['Status']
+ diag_code = content['Diagnostic-Code']
+
+ # Permanent failure state
+ if status and int(status[:1]) == 5:
+ return email
+
+ # Mail forwarding loops, DNS errors and connection timeouts cause X-Postfix errors
+ if diag_code is not None and diag_code.startswith('X-Postfix'):
+ return email
+
+ failure_hints = [
+ "insufficient system storage",
+ "mailbox full",
+ "requested action aborted: local error in processing",
+ "sender address rejected",
+ "user unknown",
+ ]
+ if status and 'quota' in status.lower():
+ return email
+ if diag_code is not None:
+ ldiag_code = diag_code.lower()
+ if any(hint in ldiag_code for hint in failure_hints):
+ return email
+
+ print('! Not a permanent failure status (%s).' % status)
+ if diag_code is not None:
+ print('! Diagnostic code was: %s' % diag_code)
+ return None
+
+
+def findAddressInPlainBounce(bounce, real_bounce=None):
"""Finds the faulty email address in a non-RFC-1894 bounced email
"""
- if 'MAILER-DAEMON@' not in bounce['From'].upper():
- print('! Not a valid plain bounce (expected from MAILER-DAEMON, found %s).' % bounce['From'])
+ # real_bounce is the full email and bounce only the text/plain part, if email have several MIME parts
+ real_bounce = real_bounce or bounce
+ lower_from = real_bounce['From'].lower()
+ if 'mailer-daemon@' not in lower_from and 'postmaster' not in lower_from:
+ print('! Not a valid plain bounce (expected from MAILER-DAEMON or postmaster, found %s).' % bounce['From'])
return None
if bounce.get_content_type() != 'text/plain':
print('! Not a valid plain bounce (expected text/plain, found %s).' % bounce.get_content_type())
return None
- subject = findSubject(bounce).lower()
- if (subject != 'failure notice'
- and subject != 'undeliverable message'
- and not subject.startswith('mail delivery failed')
- and subject != 'delivery status notification (failure)'):
-
+ subject = findSubject(real_bounce).lower()
+ known_subjects = [
+ "delivery status notification (failure)",
+ "failure notice",
+ "mail delivery failure",
+ "returned mail: see transcript for details",
+ "undeliverable message",
+ "undelivered mail returned to sender",
+ ]
+ if subject not in known_subjects and not subject.startswith('mail delivery failed'):
print('! Not a valid plain bounce (unknown subject: %s).' % subject)
return None
# Read the 15 first lines of content and find some relevant keywords to validate the bounce
lines = bounce.get_payload().splitlines()[:15]
+ # ALTOSPAM is a service which requires to click on a link when sending an email
+ # Don't consider the "554 5.0.0 Service unavailable" returned by ALTOSPAM as a failure
+ # but put this message in the dsn-temp mailbox so that it can be processed by hand.
+ if any("ALTOSPAM which is used by the person" in line for line in lines):
+ print('! ALTOSPAM has been detected. Moving this message to the dsn-temp mbox')
+ return None
+
# Match:
# A message that you sent could not be delivered to one or more of its recipients.
# I'm afraid I wasn't able to deliver your message to the following addresses.
# The following message to <email@example.com> was undeliverable.
non_delivery_hints = [
+ "could not be delivered to",
"Delivery to the following recipient failed permanently",
+ "I'm sorry to have to inform you that your message could not",
"I wasn't able to deliver your message",
+ "try to send your message again at a later time",
+ "User unknown in local recipient table",
"> was undeliverable.",
- "could not be delivered to",
"we were unable to deliver your message",
]
if not any(any(hint in line for hint in non_delivery_hints) for line in lines):
# 5.1.0 - Unknown address error 550-'email@example.com... No such user'
permanent_error_hints = [
"Delivery to the following recipient failed permanently",
+ "failed due to an unavailable mailbox",
+ "following addresses had permanent fatal errors",
+ "I'm sorry to have to inform you that your message could not",
+ "The email account that you tried to reach does not exist",
"This is a permanent error",
"Unknown address error",
+ "unreachable for too long",
"550 Requested action not taken",
]
if not any(any(hint in line for hint in permanent_error_hints) for line in lines):
for line in lines:
match = re.match(r'.*?<([0-9a-zA-Z_.-]+@[0-9a-zA-Z_.-]+)>', line)
if match is None:
- match = re.match(r'^\s*([0-9a-zA-Z_.-]+@[0-9a-zA-Z_.-]+)\s*$', line)
+ match = re.match(r'^\s*"?([0-9a-zA-Z_.-]+@[0-9a-zA-Z_.-]+)"?\s*$', line)
if match is not None:
email = match.group(1)
if email.endswith('@polytechnique.org'):
self.seen += 1
# Special case: ignore mailman notifications for the mailing-list
# on which the NL is forwarded
- if message['From'] == 'newsletter-externes-bounces@polytechnique.org':
+ if message['From'] == 'newsletter-externes-owner@polytechnique.org':
print('! Dropping a notification from mailman for newsletter-externes@polytechnique.org, this should be OK.')
self.seen -= 1
return True
# Additionnal checks, just to be sure
elif message['From'] != 'MAILER-DAEMON@polytechnique.org (Mail Delivery System)' \
or message['Subject'] != 'Undelivered Mail Returned to Sender':
- print('! Not an usual direct bounce (From="%s", Subject="%s").' % (message['From'], message['Subject']))
+ print('! Not an usual direct bounce (From=%r, Subject=%r).' % (message['From'], message['Subject']))
else:
email = findAddressInBounce(message)
if email is not None:
r'^Absen(t|ce)',
r'^(AUTO: )?Out of (the )?office',
r'^Auto( ?): ',
+ r'^AutoRe( ?):',
r'^Automatic reply: ',
r'automatique d\'absence',
r'AutoReply',
r'(est|is) absent',
+ r'^En dehors du bureau',
r'I am out of town',
r'I am currently away',
r'(am|is) out of (the )?office',
r'Notification d\'absence',
+ r'^Out of email reach',
r'R.{1,2}ponse automatique( :)?', # There may be encoding error of e acute
+ r'^Respuesta de Estoy ausente:',
]
self.subject_regexes = [re.compile(sre, re.I | re.U) for sre in subject_re]
report_message = message
# Find real report inside attachment
if message.get_content_type() == 'multipart/mixed':
+ # Some MTA confuse multipart/mixed with multipart/report
+ # Let's try to find a report!
+ if len(message.get_payload()) >= 2:
+ try_status = message.get_payload(1)
+ if try_status.get_content_type() == 'message/delivery-status':
+ # The world would be a nice place if delivery-status were
+ # formatted as expected...
+ email = findAddressInWeirdDeliveryStatus(try_status)
+ if email is not None:
+ self.emails.append(email)
+ self.mbox.add(message)
+ return True
+ try_status = None
report_message = message.get_payload(0)
# Process report if its type is correct
return True
# Detect ill-formatted reports, sent as plain text email
- if 'MAILER-DAEMON@' in message['From'].upper():
- email = findAddressInPlainBounce(message)
+ if report_message.get_content_type() == 'text/plain' and (
+ 'MAILER-DAEMON@' in message.get('From', '').upper() or
+ 'mail delivery failure' == message.get('Subject', '').lower()
+ ):
+ email = findAddressInPlainBounce(report_message)
if email is not None:
self.emails.append(email)
self.mbox.add(message)
projects / platal.git / blobdiff