diff --git a/otc/observability.t09.de/stacks/observability/victoria-k8s-stack/values.yaml b/otc/observability.t09.de/stacks/observability/victoria-k8s-stack/values.yaml
index c0d8c4c..21d636c 100644
--- a/otc/observability.t09.de/stacks/observability/victoria-k8s-stack/values.yaml
+++ b/otc/observability.t09.de/stacks/observability/victoria-k8s-stack/values.yaml
@@ -557,7 +557,7 @@ alertmanager:
             to: 'franz.germann@telekom.de'
             headers:
               subject: 'Grafana Mail Alerts'
-            require_tls: true
+            require_tls: false
 
   # -- Better alert templates for [slack source](https://gist.github.com/milesbxf/e2744fc90e9c41b47aa47925f8ff6512)
   monzoTemplate: