diff --git a/scripts/install b/scripts/install
index 1a284bf..9bda175 100755
--- a/scripts/install
+++ b/scripts/install
@@ -78,7 +78,8 @@ ynh_app_setting_set "$app" github_token "$github_token"
 
 ynh_install_app_dependencies libxml2-dev libxslt-dev libfreetype6-dev \
 	libjpeg-dev libz-dev libyaml-dev python-dev python-pip python-virtualenv \
-	postgresql libpq-dev uwsgi uwsgi-plugin-python memcached
+	postgresql libpq-dev uwsgi uwsgi-plugin-python memcached \
+	mailutils
 
 #=================================================
 # CREATE A PostgreSQL DATABASE
diff --git a/scripts/restore b/scripts/restore
index df2040f..4159545 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -76,7 +76,8 @@ chown -R "$app": "$final_path"
 
 ynh_install_app_dependencies libxml2-dev libxslt-dev libfreetype6-dev \
 	libjpeg-dev libz-dev libyaml-dev python-dev python-pip python-virtualenv \
-	postgresql libpq-dev uwsgi uwsgi-plugin-python memcached
+	postgresql libpq-dev uwsgi uwsgi-plugin-python memcached \
+	mailutils
 
 #=================================================
 # RESTORE THE PostgreSQL DATABASE
diff --git a/scripts/upgrade b/scripts/upgrade
index 857a08d..08d1adf 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -136,7 +136,8 @@ chsh --shell /bin/bash "$app"
 
 ynh_install_app_dependencies libxml2-dev libxslt-dev libfreetype6-dev \
 	libjpeg-dev libz-dev libyaml-dev python-dev python-pip python-virtualenv \
-	postgresql libpq-dev uwsgi uwsgi-plugin-python memcached
+	postgresql libpq-dev uwsgi uwsgi-plugin-python memcached \
+	mailutils
 
 #=================================================
 # SPECIFIC SETUP uwsgi