def getAutomationIndicators(self, message):
"""Look for headers that indicate automated email.
If the message appears to be automated rather than written
by a person, this method returns a mapping containing 'error'.
Otherwise an empty mapping is returned.
"""
info = {}
# Like Mailman, if a message has "Precedence: bulk|junk|list",
# discard it. The Precedence header is non-standard, yet
# widely supported.
precedence = decode_header(message.get('Precedence', '')).lower()
if precedence in ('bulk', 'junk', 'list'):
info['error'] = 'Precedence: %s' % precedence
return info
# rfc3834 is the standard way to discard automated responses, but
# it is not yet widely supported.
auto_submitted = decode_header(
message.get('Auto-Submitted', '')).lower()
if auto_submitted.startswith('auto'):
info['error'] = 'Auto-Submitted: %s' % auto_submitted
return info
subject_lower = decode_header(message.get('Subject', '')).lower()
if 'autoreply' in subject_lower or 'out of office' in subject_lower:
info['error'] = 'vacation message'
return info
return info
def getMessageAuthorAndSubject(self, message):
"""Return a mapping describing the author and subject of a message.
If there is no error, the mapping will contain 'author' (a
profile ID) and 'subject'. It will also contain 'from' for
debugging purposes.
If an error occurs, the mapping will contain 'error' and
may contain 'from', 'author', and 'subject'.
"""
info = {}
fromaddrs = self.getAddrList(message, 'From')
if len(fromaddrs) == 0:
info['error'] = 'missing From:'
return info
if len(fromaddrs) > 1:
info['error'] = 'multiple From:'
return info
info['from'] = fromaddrs
realname, email = fromaddrs[0]
author = self.getAuthor(email)
if not author:
info['error'] = 'author not found'
return info
info['author'] = author
subject = decode_header(message['Subject'])
if not subject:
info['error'] = 'missing Subject:'
return info
info['subject'] = subject
return info