diff --git a/clusters/cl01tl/applications/roundcube/values.yaml b/clusters/cl01tl/applications/roundcube/values.yaml
index 40624241e..11cdf8587 100644
--- a/clusters/cl01tl/applications/roundcube/values.yaml
+++ b/clusters/cl01tl/applications/roundcube/values.yaml
@@ -47,8 +47,6 @@ roundcube:
               value: stalwart.stalwart
             - name: ROUNDCUBEMAIL_SMTP_PORT
               value: 25
-            - name: ROUNDCUBEMAIL_USERNAME_DOMAIN
-              value: alexlebens.dev
             - name: ROUNDCUBEMAIL_SKIN
               value: elastic
             - name: ROUNDCUBEMAIL_PLUGINS