try again.

tests/compose/webmail/01_ensure_admin_unreachable.sh

@@ -3,5 +3,8 @@
 IP="$(docker inspect webmail_webmail_1|jq -r '.[0].NetworkSettings.Networks.webmail_default.IPAddress')"
 
 MAIN_RETURN_CODE=$(curl -I -so /dev/null -w "%{http_code}" http://$IP/)
-[[ $MAIN_RETURN_CODE -ne 200 ]] && [[ $MAIN_RETURN_CODE -ne 302 ]] && echo "The default page of snappymail hasn't returned 200!" >>/dev/stderr && exit 1
+[[ $MAIN_RETURN_CODE -ne 200 && $MAIN_RETURN_CODE -ne 302 ]] && echo "The default page of snappymail hasn't returned 200 but $MAIN_RETURN_CODE!" >>/dev/stderr && exit 1
 [[ $(curl -I -so /dev/null -w "%{http_code}" http://$IP/?admin) -ne 403 ]] && echo "The admin of snappymail is not disabled!" >>/dev/stderr && exit 1
+echo "Everything OK" >/dev/stderr
+
+exit 0