~mailman-coders/mailman/2.1

# Copyright (C) 1998-2018 by the Free Software Foundation, Inc.

#

# This program is free software; you can redistribute it and/or

# modify it under the terms of the GNU General Public License

# as published by the Free Software Foundation; either version 2

# of the License, or (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,

# USA.

"""Something which claims

X-Mailer: <SMTP32 vXXXXXX>

What the heck is this thing?  Here's a recent host:

% telnet 207.51.255.218 smtp

Trying 207.51.255.218...

Connected to 207.51.255.218.

Escape character is '^]'.

220 X1 NT-ESMTP Server 208.24.118.205 (IMail 6.00 45595-15)

"""

import re

import email

ecre = re.compile('original message follows', re.IGNORECASE)

acre = re.compile(r'''

    (                                             # several different prefixes

    user\ mailbox[^:]*:                           # have been spotted in the

    |delivery\ failed[^:]*:                       # wild...

    |unknown\ user[^:]*:

    |undeliverable\ +to

    |delivery\ userid[^:]*:

    )

    \s*                                           # space separator

    (?P<addr>[^\s]*)                              # and finally, the address

    ''', re.IGNORECASE | re.VERBOSE)

def process(msg):

    mailer = msg.get('x-mailer', '')

    if not mailer.startswith('<SMTP32 v'):

        return

    addrs = {}

    for line in email.Iterators.body_line_iterator(msg):

        if ecre.search(line):

            break

        mo = acre.search(line)

        if mo:

            addrs[mo.group('addr')] = 1

    return addrs.keys()