diff --git a/clusters/cl01tl/applications/roundcube/values.yaml b/clusters/cl01tl/applications/roundcube/values.yaml
index e5e363033..648905624 100644
--- a/clusters/cl01tl/applications/roundcube/values.yaml
+++ b/clusters/cl01tl/applications/roundcube/values.yaml
@@ -40,13 +40,13 @@ roundcube:
                   name: roundcube-key-secret
                   key: DES_KEY
             - name: ROUNDCUBEMAIL_DEFAULT_HOST
-              value: stalwart.stalwart
+              value: tls://stalwart.stalwart
             - name: ROUNDCUBEMAIL_DEFAULT_PORT
-              value: 143
+              value: 993
             - name: ROUNDCUBEMAIL_SMTP_SERVER
-              value: stalwart.stalwart
+              value: ssl://stalwart.stalwart
             - name: ROUNDCUBEMAIL_SMTP_PORT
-              value: 25
+              value: 465
             - name: ROUNDCUBEMAIL_USERNAME_DOMAIN
               value: alexlebens.dev
             - name: ROUNDCUBEMAIL_SKIN