diff --git a/gestion/tools/postdiff.py b/gestion/tools/postdiff.py
new file mode 100755
index 00000000..3e2d517e
--- /dev/null
+++ b/gestion/tools/postdiff.py
@@ -0,0 +1,101 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+#
+# postdiff.py
+# -----------
+#
+# Copyright (C) 2007 Jeremie Dimino <jeremie@dimino.org>
+#
+# This file 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 file 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 Street #330, Boston, MA 02111-1307, USA.
+
+'''Petit utilitaire pour voir les différences de configuration entre deux
+fichiers de configurations main.cf de postfix'''
+
+import sys, re, commands
+
+__re_param_separator = re.compile('[ \t]*,[ \t]*|[ \t]+')
+
+def postconf(conf_dir):
+    vars = commands.getoutput("/usr/sbin/postconf -n -c %s" % conf_dir).split('\n')[0:-1]
+    canonicalized = {}
+    for var in vars:
+        [varname, params] = var.split(' = ')
+        params = __re_param_separator.split(params)
+        params.sort()
+        canonicalized[varname] = params
+    del canonicalized["config_directory"]
+    return canonicalized
+
+def compare(a, b):
+    common = []
+    onlya = []
+    onlyb = []
+    for var in a:
+        if b.has_key(var):
+            common.append(var)
+        else:
+            onlya.append(var)
+    for var in b:
+        if a.has_key(var):
+            if not var in common:
+                common.append(var)
+        else:
+            onlyb.append(var)
+    return common, onlya, onlyb
+
+def __usage(err):
+    sys.stderr.write("%s\n" % err)
+    sys.stderr.write("usage: %s <main.cf_1> <main.cf_2>\n" % os.path.basename(sys.argv[0]))
+    sys.exit(2)
+    
+if __name__ == '__main__':
+    import tempfile, os, sys
+    sys.path.append('/usr/scripts/gestion')
+    from affich_tools import cprint
+
+    if len(sys.argv) != 3:
+        __usage("Mauvais nombre d'arguments")
+
+    for i in 1, 2:
+        if not os.access(sys.argv[i], os.R_OK):
+            __usage("%s n'est pas lisible!" % sys.argv[i])
+
+    conf = {}
+    # On copie les fichier car postconf n'accepte qu'un dossier en
+    # paramètre et non un fichier directement
+    tempd = tempfile.mkdtemp()
+    for i in 1, 2:
+        open(tempd + "/main.cf", "w").write(file(sys.argv[i]).read())
+        conf[i] = postconf(tempd)
+    os.unlink(tempd + "/main.cf")
+    os.rmdir(tempd)
+
+    diff = compare(conf[1], conf[2])
+    diff_common = filter(lambda var: conf[1][var] != conf[2][var], diff[0])
+    for i in 0, 1, 2:
+        diff[i].sort()
+    for i in 1, 2:
+        if len(diff[i]) > 0:
+            cprint(u"variables définis uniquement dans %s" % sys.argv[i], "bleu")
+            for var in diff[i]:
+                print " %s = %s" % (var, ", ".join(conf[i][var]))
+    if len(diff_common) > 0:
+        cprint(u"variables différentes dans a:%s et b:%s" % (sys.argv[1], sys.argv[2]), "bleu")
+        for var in diff_common:
+            cprint(" a:%s = %s" % (var, ", ".join(conf[1][var])), "gris")
+            cprint(" b:%s = %s" % (var, ", ".join(conf[2][var])), "gras")
+    if len(diff_common) == 0 and len(diff[1]) == 0 and len(diff[2]) == 0:
+        cprint("Les fichiers sont identiques!")
+