0 ͈ÅØ 0×ÀÕ ψÙØ „d!x?×ÀÕ?÷Ï#! /opt/alt/python-internal/bin/python3.11 """An RFC 5321 smtp proxy with optional RFC 1870 and RFC 6531 extensions. Usage: %(program)s [options] [localhost:localport [remotehost:remoteport]] Options: --nosetuid -n This program generally tries to setuid `nobody', unless this flag is set. The setuid call will fail if this program is not run as root (in which case, use this flag). --version -V Print the version number and exit. --class classname -c classname Use `classname' as the concrete SMTP proxy class. Uses `PureProxy' by default. --size limit -s limit Restrict the total size of the incoming message to "limit" number of bytes via the RFC 1870 SIZE extension. Defaults to 33554432 bytes. --smtputf8 -u Enable the SMTPUTF8 extension and behave as an RFC 6531 smtp proxy. --debug -d Turn on debugging prints. --help -h Print this message and exit. Version: %(__version__)s If localhost is not given then `localhost' is used, and if localport is not given then 8025 is used. If remotehost is not given then `localhost' is used, and if remoteport is not given, then 25 is used. """ # Overview: # # This file implements the minimal SMTP protocol as defined in RFC 5321. It # has a hierarchy of classes which implement the backend functionality for the # smtpd. A number of classes are provided: # # SMTPServer - the base class for the backend. Raises NotImplementedError # if you try to use it. # # DebuggingServer - simply prints each message it receives on stdout. # # PureProxy - Proxies all messages to a real smtpd which does final # delivery. One known problem with this class is that it doesn't handle # SMTP errors from the backend server at all. This should be fixed # (contributions are welcome!). # # # Author: Barry Warsaw # # TODO: # # - support mailbox delivery # - alias files # - Handle more ESMTP extensions # - handle error codes from the backend smtpd import sys import os import errno import getopt import time import socket import collections from warnings import _deprecated, warn from email._header_value_parser import get_addr_spec, get_angle_addr __all__ = [ "SMTPChannel", "SMTPServer", "DebuggingServer", "PureProxy", ] _DEPRECATION_MSG = ('The {name} module is deprecated and unmaintained and will ' 'be removed in Python {remove}. Please see aiosmtpd ' '(https://aiosmtpd.readthedocs.io/) for the recommended ' 'replacement.') _deprecated(__name__, _DEPRECATION_MSG, remove=(3, 12)) # These are imported after the above warning so that users get the correct # deprecation warning. import asyncore import asynchat program = sys.argv[0] __version__ = 'Python SMTP proxy version 0.3' class Devnull: def write(self, msg): pass def flush(self): pass DEBUGSTREAM = Devnull() NEWLINE = '\n' COMMASPACE = ', ' DATA_SIZE_DEFAULT = 33554432 def usage(code, msg=''): print(__doc__ % globals(), file=sys.stderr) if msg: print(msg, file=sys.stderr) sys.exit(code) class SMTPChannel(asynchat.async_chat): COMMAND = 0 DATA = 1 command_size_limit = 512 command_size_limits = collections.defaultdict(lambda x=command_size_limit: x) @property def max_command_size_limit(self): try: return max(self.command_size_limits.values()) except ValueError: return self.command_size_limit def __init__(self, server, conn, addr, data_size_limit=DATA_SIZE_DEFAULT, map=None, enable_SMTPUTF8=False, decode_data=False): asynchat.async_chat.__init__(self, conn, map=map) self.smtp_server = server self.conn = conn self.addr = addr self.data_size_limit = data_size_limit self.enable_SMTPUTF8 = enable_SMTPUTF8 self._decode_data = decode_data if enable_SMTPUTF8 and decode_data: