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diff --git a/Mailman/Handlers/Sendmail.py b/Mailman/Handlers/Sendmail.py
new file mode 100644
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+++ b/Mailman/Handlers/Sendmail.py
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+# Copyright (C) 1998 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 `sendmail' drop-off.
+
+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 that
+4k in size.
+
+"""
+
+import string
+import os
+import HandlerAPI
+from Mailman import mm_cfg
+
+class SendmailHandlerError(HandlerAPI.HandlerError):
+    pass
+
+
+MAX_CMDLINE = 3000
+
+
+
+def process(mlist, msg):
+    """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.
+    
+    """
+    # make sure the command line is of a manageable size
+    recipchunks = []
+    currentchunk = []
+    chunklen = 0
+    for r in msg.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)
+    # cycle through all chunks
+    for recips in recipchunks:
+        fp = os.popen(mm_cfg.SENDMAIL_CMD + ' ' + recips, 'w')
+        fp.write(msgtext)
+        status = fp.close()
+        if status:
+            errcode = (status & 0xff00) >> 8
+            mlist.LogMsg('post', 'post to %s from %s, size=%d, failure=%d' %
+                         (mlist.internal_name(), msg.GetSender(),
+                          len(msg.body), errcode))
+            raise SendmailHandlerError(errcode)
+        # Log the successful post
+        mlist.LogMsg('post', 'post to %s from %s, size=%d, success' %
+                     (mlist.internal_name(), msg.GetSender(), len(msg.body)))