diff --git a/README.md b/README.md
index 14ec5f42..c53ee38d 100644
--- a/README.md
+++ b/README.md
@@ -133,10 +133,14 @@ Il est possible de travailler sur une instance Docker.
           build: /chemin/vers/nk20
           volumes:
             - /chemin/vers/nk20:/code/
+          environment:
+            MAILING_LIST_DOMAIN: lists.example.com
+            NOTE_URL: nk20.example.com
+            DOMAIN: example.com
           restart: always
           labels:
-            - traefik.domain=ndd.exemple.com
-            - traefik.frontend.rule=Host:ndd.exemple.com
+            - traefik.domain=ndd.example.com
+            - traefik.frontend.rule=Host:ndd.example.com
             - traefik.port=8000
 
 3. Enjoy :
diff --git a/apps/note/templatetags/__init__.py b/apps/note/templatetags/__init__.py
index e69de29b..19b8e45b 100644
--- a/apps/note/templatetags/__init__.py
+++ b/apps/note/templatetags/__init__.py
@@ -0,0 +1,12 @@
+# Copyright (C) 2018-2020 by BDE ENS Paris-Saclay
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+from django import template
+
+from .getenv import getenv
+from .pretty_money import pretty_money
+
+register = template.Library()
+
+register.filter('getenv', getenv)
+register.filter('pretty_money', pretty_money)
diff --git a/apps/note/templatetags/getenv.py b/apps/note/templatetags/getenv.py
new file mode 100644
index 00000000..7710a389
--- /dev/null
+++ b/apps/note/templatetags/getenv.py
@@ -0,0 +1,8 @@
+# Copyright (C) 2018-2020 by BDE ENS Paris-Saclay
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+import os
+
+
+def getenv(value):
+    return os.getenv(value)
diff --git a/apps/note/templatetags/pretty_money.py b/apps/note/templatetags/pretty_money.py
index 12530c6e..5db2a1c0 100644
--- a/apps/note/templatetags/pretty_money.py
+++ b/apps/note/templatetags/pretty_money.py
@@ -1,8 +1,6 @@
 # Copyright (C) 2018-2020 by BDE ENS Paris-Saclay
 # SPDX-License-Identifier: GPL-3.0-or-later
 
-from django import template
-
 
 def pretty_money(value):
     if value % 100 == 0:
@@ -16,7 +14,3 @@ def pretty_money(value):
             abs(value) // 100,
             abs(value) % 100,
         )
-
-
-register = template.Library()
-register.filter('pretty_money', pretty_money)
diff --git a/note_kfet/settings/__init__.py b/note_kfet/settings/__init__.py
index ce31b39f..10b21970 100644
--- a/note_kfet/settings/__init__.py
+++ b/note_kfet/settings/__init__.py
@@ -51,12 +51,14 @@ except ImportError:
 if "cas" in INSTALLED_APPS:
     MIDDLEWARE += ['cas.middleware.CASMiddleware']
     # CAS Settings
+    CAS_SERVER_URL = "https://" + os.getenv("NOTE_URL") + "/cas/"
     CAS_AUTO_CREATE_USER = False
     CAS_LOGO_URL = "/static/img/Saperlistpopette.png"
     CAS_FAVICON_URL = "/static/favicon/favicon-32x32.png"
     CAS_SHOW_SERVICE_MESSAGES = True
     CAS_SHOW_POWERED = False
     CAS_REDIRECT_TO_LOGIN_AFTER_LOGOUT = False
+    CAS_PROVIDE_URL_TO_LOGOUT = True
     CAS_INFO_MESSAGES = {
         "cas_explained": {
             "message": _(
diff --git a/note_kfet/settings/development.py b/note_kfet/settings/development.py
index cf738f33..61f6d530 100644
--- a/note_kfet/settings/development.py
+++ b/note_kfet/settings/development.py
@@ -39,7 +39,7 @@ EMAIL_BACKEND = 'django.core.mail.backends.console.EmailBackend'
 # EMAIL_HOST_USER = 'change_me'
 # EMAIL_HOST_PASSWORD = 'change_me'
 
-SERVER_EMAIL = 'no-reply@example.org'
+SERVER_EMAIL = 'no-reply@' + os.getenv("DOMAIN")
 
 # Security settings
 SECURE_CONTENT_TYPE_NOSNIFF = False
diff --git a/note_kfet/settings/production.py b/note_kfet/settings/production.py
index 4512dc85..ea1e9739 100644
--- a/note_kfet/settings/production.py
+++ b/note_kfet/settings/production.py
@@ -1,6 +1,8 @@
 # Copyright (C) 2018-2020 by BDE ENS Paris-Saclay
 # SPDX-License-Identifier: GPL-3.0-or-later
 
+import os
+
 ########################
 # Production  Settings #
 ########################
@@ -37,7 +39,7 @@ EMAIL_BACKEND = 'django.core.mail.backends.console.EmailBackend'
 # EMAIL_HOST_USER = 'change_me'
 # EMAIL_HOST_PASSWORD = 'change_me'
 
-SERVER_EMAIL = 'no-reply@example.org'
+SERVER_EMAIL = 'no-reply@' + os.getenv("DOMAIN")
 
 # Security settings
 SECURE_CONTENT_TYPE_NOSNIFF = False
@@ -49,4 +51,4 @@ X_FRAME_OPTIONS = 'DENY'
 SESSION_COOKIE_AGE = 60 * 60 * 3
 
 # CAS Client settings
-CAS_SERVER_URL = "https://note.crans.org/cas/"
+CAS_SERVER_URL = "https://" + os.getenv("NOTE_URL") + "/cas/"
diff --git a/templates/base.html b/templates/base.html
index 94810b87..57c741d0 100644
--- a/templates/base.html
+++ b/templates/base.html
@@ -1,4 +1,4 @@
-{% load static i18n pretty_money static %}
+{% load static i18n pretty_money static getenv %}
 {% comment %}
 SPDX-License-Identifier: GPL-3.0-or-later
 {% endcomment %}
@@ -128,7 +128,7 @@ SPDX-License-Identifier: GPL-3.0-or-later
                       class="form-inline">
                     <span class="text-muted mr-1">
                         NoteKfet2020 &mdash;
-                        <a href="mailto:tresorie.bde@lists.crans.org"
+                        <a href="mailto:tresorie.bde@{{ "MAILING_LIST_DOMAIN" | getenv }}"
                            class="text-muted">Nous contacter</a> &mdash;
                     </span>
                     {% csrf_token %}