diff --git a/manifest.toml b/manifest.toml
index 462d70b..1bbc9de 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -45,6 +45,10 @@ ram.runtime = "800M"
     [install.password]
     type = "password"
 
+    [install.email]
+    type = "email"
+    example = "user@example.org"
+
 [resources]
     [resources.system_user]
 
diff --git a/scripts/install b/scripts/install
index 2cbb984..3ef8db1 100755
--- a/scripts/install
+++ b/scripts/install
@@ -11,9 +11,6 @@ source /usr/share/yunohost/helpers
 # INITIALIZE AND STORE SETTINGS
 #=================================================
 
-# Maybe add that as install arg ?
-email="admin@$domain"
-
 # mailman3-app database
 db_name_app=$(ynh_sanitize_dbid --db_name="${app}_app")
 db_user_app=$db_name_app
@@ -88,7 +85,7 @@ popd
 #=================================================
 ynh_script_progression --message="Creating superuser..."
 pushd /usr/share/mailman3-web
-    echo "from django.contrib.auth import get_user_model; User = get_user_model(); User.objects.create_superuser('$admin', '$email', '$password')" | python manage.py shell
+    echo "from django.contrib.auth import get_user_model; User = get_user_model(); User.objects.create_superuser('$admin', '$email', '$password')" | python3 manage.py shell
 popd
 
 #=================================================