diff --git a/README.creole b/README.creole
index 2d0bcd92cb9354aa491b43ff4b927aaac26a87d8..ee7f75801defb63fab1c87b20bf4f07841bf525d 100644
--- a/README.creole
+++ b/README.creole
@@ -126,6 +126,15 @@ Un moyen simple de fair tourner un serveur SMTP à cette adresse est d'utiliser
 ~ # /etc/init.d/apache2 reload
 }}}
 
+Des variables d'environnement sont prévues pour surcharger l'adresse mail d'envoi, ainsi que le logo.
+
+Exemples:
+{{{
+	export ADL_LOGO=https://agendadulibre.qc.ca/assets/logo-adlq-e0f0cac6a29fbf64b8e0f7c957cda37fd2678ddd95fab8afa396482b70146174.png
+	export ADL_MAIL=test@exemple.com
+}}}
+
+(d'autres peuvent être rajoutées si des surcharges sont souhaitées)
 
 == Aide mémoire
 
diff --git a/app/views/layouts/application.html.haml b/app/views/layouts/application.html.haml
index a7cf7f6442fe80df7b5a0688767297f180d6b2a3..9734755021dae10ad863a9c592e0457d46cb0bd3 100644
--- a/app/views/layouts/application.html.haml
+++ b/app/views/layouts/application.html.haml
@@ -22,7 +22,8 @@
       = render '/pages/search'
 
       = link_to root_path do
-        = image_tag 'baby_gnu_adl.png', alt: '', class: :logo
+        = image_tag ENV.fetch('ADL_LOGO', 'baby_gnu_adl.png'),
+          alt: '', class: :logo
       %h1= link_to t('.title'), root_path
       %h2= t '.subtitle'
 
diff --git a/config/application.rb b/config/application.rb
index 8b5cf4b430d1b8ff36a32173e1c6da0293ca7d9c..af01bd234a1e543450b19fc627e86a9273d88bdf 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -37,8 +37,8 @@ module AgendaDuLibreRails
     config.i18n.fallbacks = %i[en fr]
 
     config.action_mailer.default_options = {
-      from: 'moderateurs@agendadulibre.org',
-      to: 'moderateurs@agendadulibre.org'
+      from: ENV.fetch('ADL_MAIL', 'moderateurs@agendadulibre.org'),
+      to: ENV.fetch('ADL_MAIL', 'moderateurs@agendadulibre.org')
     }
 
     # In rails 4, plugin and vendor images need to be precompiled