diff --git a/DMS/docker-compose.yml b/DMS/docker-compose.yml
index fe6dedb..78a417d 100644
--- a/DMS/docker-compose.yml
+++ b/DMS/docker-compose.yml
@@ -135,10 +135,10 @@ services:
       - ROUNDCUBEMAIL_DB_USER=roundcube
       - ROUNDCUBEMAIL_DB_PASSWORD=${ROUNDCUBE_DB_PASSWORD}
       # Roundcube verbindet intern über den Docker-Alias
-      - ROUNDCUBEMAIL_DEFAULT_HOST=ssl://mailserver
-      - ROUNDCUBEMAIL_DEFAULT_PORT=993
-      - ROUNDCUBEMAIL_SMTP_SERVER=tls://mailserver
-      - ROUNDCUBEMAIL_SMTP_PORT=587
+      - ROUNDCUBEMAIL_DEFAULT_HOST=mailserver        # kein ssl:// prefix
+      - ROUNDCUBEMAIL_DEFAULT_PORT=143               # IMAP ohne SSL
+      - ROUNDCUBEMAIL_SMTP_SERVER=mailserver         # kein tls:// prefix  
+      - ROUNDCUBEMAIL_SMTP_PORT=25                   # SMTP intern direkt
       - ROUNDCUBEMAIL_PLUGINS=password,email_config
     ports:
       - "8888:80"