diff --git a/conf/mail.exs b/conf/mail.exs
index 722cb1a..9cfbe90 100644
--- a/conf/mail.exs
+++ b/conf/mail.exs
@@ -1,7 +1,9 @@
 
 config :mobilizon, Mobilizon.Web.Email.Mailer,
-  adapter: Swoosh.Adapters.SMTP,
-  relay: "127.0.0.1",
+  #adapter: Swoosh.Adapters.SMTP,
+  #relay: "127.0.0.1",
+  adapter: Bamboo.SMTPAdapter,
+  server: "127.0.0.1",
   #hostname: "127.0.0.1",
   # usually 25, 465 or 587
   port: 25,
@@ -15,4 +17,3 @@ config :mobilizon, Mobilizon.Web.Email.Mailer,
   no_mx_lookups: false,
   # can be `:always`. If your smtp relay requires authentication set it to `:always`.
   auth: :always
-
diff --git a/scripts/upgrade b/scripts/upgrade
index 60d4cc8..9dea720 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -248,8 +248,8 @@ ynh_script_progression --message="Updating a configuration file..."
 config="/etc/$app/config.exs"
 
 ynh_backup_if_checksum_is_different --file="$config"
-ynh_replace_string --match_string="adapter: Bamboo.SMTPAdapter," --replace_string="adapter: Swoosh.Adapters.SMTP," --target_file="$config"
-ynh_replace_string --match_string="server: \"127.0.0.1\"," --replace_string="relay: \"127.0.0.1\"," --target_file="$config"
+ynh_replace_string --match_string="adapter: Swoosh.Adapters.SMTP," --replace_string="adapter: Bamboo.SMTPAdapter," --target_file="$config"
+ynh_replace_string --match_string="relay: \"127.0.0.1\"," --replace_string="server: \"127.0.0.1\"," --target_file="$config"
 ynh_store_file_checksum --file="$config"
 
 chmod 400 "$config"