diff --git a/modoboa/admin/views.py b/modoboa/admin/views.py
index 706d9367e..e1a25e869 100644
--- a/modoboa/admin/views.py
+++ b/modoboa/admin/views.py
@@ -481,28 +481,10 @@ def viewsettings(request, tplname='admin/settings_header.html'):
 @login_required
 @user_passes_test(lambda u: u.is_superuser)
 def viewparameters(request, tplname='admin/parameters.html'):
-    apps = sorted(parameters._params.keys())
-    gparams = []
-    for app in apps:
-        tmp = {"name" : app, "params" : []}
-        for p in parameters._params_order[app]['A']:
-
-            param_def = parameters._params[app]['A'][p]
-            newdef = {"name" : p, 
-                      "value" : parameters.get_admin(p, app=app),
-                      "help" : param_def["help"],
-                      "default" : param_def["deflt"],
-                      "type" : param_def["type"]}
-            for k in ["values", "visible_if"]:
-                if k in param_def.keys():
-                    newdef[k] = param_def[k]
-            tmp["params"] += [newdef]
-        gparams += [tmp]
-
     return ajax_simple_response({
             "status" : "ok",
             "left_selection" : "parameters",
-            "content" : render_to_string(tplname, {"gparams" : gparams})
+            "content" : render_to_string(tplname, {"gparams" : parameters.get_all_admin_parameters()})
             })
 
 @login_required
diff --git a/modoboa/lib/parameters.py b/modoboa/lib/parameters.py
index 93af32cbf..2dc3680a9 100644
--- a/modoboa/lib/parameters.py
+++ b/modoboa/lib/parameters.py
@@ -1,8 +1,9 @@
-# -*- coding: utf-8 -*-
+# coding: utf-8
 
 import string
 import inspect
 import re
+import copy
 
 """
 This interface provides a simple way to declare and store parameters
@@ -211,6 +212,24 @@ def get_admin(name, app=None):
         return _params[app]["A"][name]["deflt"]
     return p.value.decode("unicode_escape")
 
+def get_all_admin_parameters():
+    """Retrieve all administrative parameters
+
+    Returned parameters are sorted by application
+
+    :return: a list of dictionaries
+    """
+    result = []
+    for app in sorted(_params.keys()):
+        tmp = {"name" : app, "params" : []}
+        for p in _params_order[app]['A']:
+            newdef = copy.deepcopy(_params[app]['A'][p])
+            newdef["name"] = p
+            newdef["value"] = get_admin(p, app=app)
+            tmp["params"] += [newdef]
+        result += [tmp]
+    return result
+
 def get_user(user, name, app=None):
     from models import UserParameter
 
@@ -223,7 +242,42 @@ def get_user(user, name, app=None):
         return _params[app]["U"][name]["deflt"]
     return p.value.decode("unicode_escape")
 
+def get_all_user_params(user):
+    """Retrieve all the parameters of the given user
+
+    Returned parameters are sorted by application.
+
+    :param user: a ``User`` object
+    :return: a list of dictionaries
+    """
+    result = []
+    for app in sorted(_params.keys()):
+        if not len(_params[app]['U']):
+            continue
+        if get_app_option('U', 'needs_mailbox', False, app=app) \
+                and not user.has_mailbox:
+            continue
+        tmp = {"name" : app, "params" : []}
+        for p in _params_order[app]['U']:
+            param_def = _params[app]['U'][p]
+            newdef = copy.deepcopy(param_def)
+            newdef["name"] = p
+            newdef["value"] = get_user(user, p, app=app)
+            tmp["params"] += [newdef]
+        result += [tmp]
+    return result
+
 def get_app_option(lvl, name, dflt, app=None):
+    """Retrieve a specific option for a given application
+
+    If the option is not found, a default value is returned.
+
+    :param lvl: the option's level (U or A)
+    :param name: the option's name
+    :param dflt: the default value to return
+    :param app: the application name
+    :return: the option's value
+    """
     if app is None:
         app = __guess_extension()
     if not lvl in _params[app]['options']:
diff --git a/modoboa/userprefs/views.py b/modoboa/userprefs/views.py
index 3cdc9229b..6a44f95b8 100644
--- a/modoboa/userprefs/views.py
+++ b/modoboa/userprefs/views.py
@@ -1,5 +1,4 @@
 # coding: utf-8
-import copy
 from django.shortcuts import render
 from django.template.loader import render_to_string
 from django.core.urlresolvers import reverse
@@ -118,27 +117,9 @@ def preferences(request):
                 status="ok", respmsg=_("Preferences saved")
                 ))
 
-    apps = sorted(parameters._params.keys())
-    gparams = []
-    for app in apps:
-        if not len(parameters._params[app]['U']):
-            continue
-        if parameters.get_app_option('U', 'needs_mailbox', False, app=app) \
-                and not request.user.has_mailbox:
-            continue
-            
-        tmp = {"name" : app, "params" : []}
-        for p in parameters._params_order[app]['U']:
-            param_def = parameters._params[app]['U'][p]
-            newdef = copy.deepcopy(param_def)
-            newdef["name"] = p
-            newdef["value"] = parameters.get_user(request.user, p, app=app)
-            tmp["params"] += [newdef]
-        gparams += [tmp]
-
     return ajax_simple_response({
             "status" : "ok",
             "content" : render_to_string("userprefs/preferences.html", {
-                    "gparams" : gparams
+                    "gparams" : parameters.get_all_user_params(request.user)
                     })
             })