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diff --git a/maildir2mbox.py b/maildir2mbox.py
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+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+"""
+Frédéric Grosshans, 19 January 2012
+Nathan R. Yergler, 6 June 2010
+
+This file does not contain sufficient creative expression to invoke
+assertion of copyright. No warranty is expressed or implied; use at
+your own risk.
+
+---
+
+Uses Python's included mailbox library to convert mail archives from
+maildir [http://en.wikipedia.org/wiki/Maildir] to
+mbox [http://en.wikipedia.org/wiki/Mbox] format, icluding subfolder.
+
+See http://docs.python.org/library/mailbox.html#mailbox.Mailbox for
+full documentation on this library.
+
+---
+
+To run, save as md2mb.py and run:
+
+$ python md2mb.py [maildir_path] [mbox_filename]
+
+[maildir_path] should be the the path to the actual maildir (containing new,
+cur, tmp, and the subfolders, which are hidden directories with names like
+.subfolde.subsubfolder.subsubsbfolder);
+
+[mbox_filename] will be newly created, as well as a [mbox_filename].sbd the
+directory.
+"""
+
+import mailbox
+import sys
+import email
+import os
+
+def maildir2mailbox(maildirname, mboxfilename):
+   """
+   slightly adapted from maildir2mbox.py,
+   Nathan R. Yergler, 6 June 2010
+   http://yergler.net/blog/2010/06/06/batteries-included-or-maildir-to-mbox-again/
+
+
+   """
+   # open the existing maildir and the target mbox file
+   maildir = mailbox.Maildir(maildirname, email.message_from_file)
+   mbox = mailbox.mbox(mboxfilename)
+
+   # lock the mbox
+   mbox.lock()
+
+   # iterate over messages in the maildir and add to the mbox
+   for msg in maildir:
+       mbox.add(msg)
+
+   # close and unlock
+   mbox.close()
+   maildir.close()
+
+
+dirname=sys.argv[-2]
+mboxname=sys.argv[-1]
+print(dirname +' -> ' +mboxname)
+mboxdirname=mboxname+'.sbd'
+maildir2mailbox(dirname,mboxname)
+if not os.path.exists(mboxdirname): os.makedirs(mboxdirname)
+
+listofdirs=[dn for dn in os.walk(dirname).next()[1] if dn not in ['new', 'cur', 'tmp']]
+for curfold in listofdirs:
+   curlist=[mboxname]+curfold.split('.')
+   curpath=os.path.join(*[dn+'.sbd' for dn in curlist if dn])
+   if not os.path.exists(curpath): os.makedirs(curpath)
+   print('| ' +curfold +' -> '+curpath[:-4])
+   maildir2mailbox(os.path.join(dirname,curfold),curpath[:-4])
+
+print('Done')
+\ No newline at end of file