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Diffstat (limited to '')
| -rw-r--r-- | Mailman/Handlers/Sendmail.py | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/Mailman/Handlers/Sendmail.py b/Mailman/Handlers/Sendmail.py new file mode 100644 index 00000000..8bd88697 --- /dev/null +++ b/Mailman/Handlers/Sendmail.py @@ -0,0 +1,116 @@ +# Copyright (C) 1998,1999,2000,2001,2002 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +"""Deliver a message via command-line drop-off. + +WARNING WARNING WARNING: This module is provided for example purposes only. +It should not be used in a production environment for reasons described +below. Because of this, you must explicitly enable it with by editing the +code. See the WARN section in the process() function. + +This module delivers the message via the command line interface to the +sendmail program. It should work for sendmail clones like Postfix. It is +expected that sendmail handles final delivery, message queueing, etc. The +recipient list is only trivially split so that the command line is less than +about 3k in size. + +SECURITY WARNING: Because this module uses os.popen(), it goes through the +shell. This module does not scan the arguments for potential exploits and so +it should be considered unsafe for production use. For performance reasons, +it's not recommended either -- use the SMTPDirect delivery module instead, +even if you're using the sendmail MTA. + +DUPLICATES WARNING: Using this module can cause duplicates to be delivered to +your membership, depending on your MTA! E.g. It is known that if you're using +the sendmail MTA, and if a message contains a single dot on a line by itself, +your list members will receive many duplicates. +""" + +import string +import os + +from Mailman import mm_cfg +from Mailman import Errors +from Mailman.Logging.Syslog import syslog + +MAX_CMDLINE = 3000 + + + +def process(mlist, msg, msgdata): + """Process the message object for the given list. + + The message object is an instance of Mailman.Message and must be fully + prepared for delivery (i.e. all the appropriate headers must be set). The + message object can have the following attributes: + + recips - the list of recipients for the message (required) + + This function processes the message by handing off the delivery of the + message to a sendmail (or sendmail clone) program. It can raise a + SendmailHandlerError if an error status was returned by the sendmail + program. + + """ + # WARN: If you've read the warnings above and /still/ insist on using this + # module, you must comment out the following line. I still recommend you + # don't do this! + assert 0, 'Use of the Sendmail.py delivery module is highly discouraged' + recips = msgdata.get('recips') + if not recips: + # Nobody to deliver to! + return + # Use -f to set the envelope sender + cmd = mm_cfg.SENDMAIL_CMD + ' -f ' + mlist.GetBouncesEmail() + ' ' + # make sure the command line is of a manageable size + recipchunks = [] + currentchunk = [] + chunklen = 0 + for r in recips: + currentchunk.append(r) + chunklen = chunklen + len(r) + 1 + if chunklen > MAX_CMDLINE: + recipchunks.append(string.join(currentchunk)) + currentchunk = [] + chunklen = 0 + # pick up the last one + if chunklen: + recipchunks.append(string.join(currentchunk)) + # get all the lines of the message, since we're going to do this over and + # over again + msgtext = str(msg) + msglen = len(msgtext) + # cycle through all chunks + failedrecips = [] + for chunk in recipchunks: + # TBD: SECURITY ALERT. This invokes the shell! + fp = os.popen(cmd + chunk, 'w') + fp.write(msgtext) + status = fp.close() + if status: + errcode = (status & 0xff00) >> 8 + syslog('post', 'post to %s from %s, size=%d, failure=%d', + mlist.internal_name(), msg.get_sender(), + msglen, errcode) + # TBD: can we do better than this? What if only one recipient out + # of the entire chunk failed? + failedrecips.append(chunk) + # Log the successful post + syslog('post', 'post to %s from %s, size=%d, success', + mlist.internal_name(), msg.get_sender(), msglen) + if failedrecips: + msgdata['recips'] = failedrecips + raise Errors.SomeRecipientsFailed |