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diff --git a/src/mailman/app/inject.py b/src/mailman/app/inject.py
new file mode 100644
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+++ b/src/mailman/app/inject.py
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+# Copyright (C) 2001-2011 by the Free Software Foundation, Inc.
+#
+# This file is part of GNU Mailman.
+#
+# GNU Mailman 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 3 of the License, or (at your option)
+# any later version.
+#
+# GNU Mailman 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
+# GNU Mailman.  If not, see <http://www.gnu.org/licenses/>.
+
+"""Inject a message into a queue."""
+
+from __future__ import absolute_import, unicode_literals
+
+__metaclass__ = type
+__all__ = [
+    'inject_message',
+    'inject_text',
+    ]
+
+
+from email import message_from_string
+from email.utils import formatdate, make_msgid
+
+from mailman.config import config
+from mailman.email.message import Message
+
+
+
+def inject_message(mlist, msg, recipients=None, switchboard=None, **kws):
+    """Inject a message into a queue.
+
+    :param mlist: The mailing list this message is destined for.
+    :type mlist: IMailingList
+    :param msg: The Message object to inject.
+    :type msg: a Message object
+    :param recipients: Optional set of recipients to put into the message's
+        metadata.
+    :type recipients: sequence of strings
+    :param switchboard: Optional name of switchboard to inject this message
+        into.  If not given, the 'in' switchboard is used.
+    :type switchboard: string
+    :param kws: Additional values for the message metadata.
+    :type kws: dictionary
+    """
+    if switchboard is None:
+        switchboard = 'in'
+    # Since we're crafting the message from whole cloth, let's make sure this
+    # message has a Message-ID.
+    if 'message-id' not in msg:
+        msg['Message-ID'] = make_msgid()
+    # Ditto for Date: as required by RFC 2822.
+    if 'date' not in msg:
+        msg['Date'] = formatdate(localtime=True)
+    msgdata = dict(
+        listname=mlist.fqdn_listname,
+        original_size=getattr(msg, 'original_size', len(msg.as_string())),
+        )
+    msgdata.update(kws)
+    if recipients is not None:
+        msgdata['recipients'] = recipients
+    config.switchboards[switchboard].enqueue(msg, **msgdata)
+
+
+
+def inject_text(mlist, text, recipients=None, switchboard=None, **kws):
+    """Turn text into a message and inject that into a queue.
+
+    :param mlist: The mailing list this message is destined for.
+    :type mlist: IMailingList
+    :param text: The text of the message to inject.  This will be parsed into
+        a Message object.
+    :type text: byte string
+    :param recipients: Optional set of recipients to put into the message's
+        metadata.
+    :type recipients: sequence of strings
+    :param switchboard: Optional name of switchboard to inject this message
+        into.  If not given, the 'in' switchboard is used.
+    :type switchboard: string
+    :param kws: Additional values for the message metadata.
+    :type kws: dictionary
+    """
+    message = message_from_string(text, Message)
+    message.original_size = len(text)
+    inject_message(mlist, message, recipients, switchboard, **kws)