diff --git a/deploy-chatmail/src/deploy_chatmail/nginx/mta-sts.txt.j2 b/deploy-chatmail/src/deploy_chatmail/nginx/mta-sts.txt.j2
index a74f64d0..34d117e7 100644
--- a/deploy-chatmail/src/deploy_chatmail/nginx/mta-sts.txt.j2
+++ b/deploy-chatmail/src/deploy_chatmail/nginx/mta-sts.txt.j2
@@ -1,4 +1,4 @@
-version: STSv1
-mode: enforce
-max_age: 2419200  # 28 days
-mx: {{ config.mail_server }}
+version: STSv1
+mode: enforce
+mx: {{ config.mail_server }}
+max_age: 2419200