diff --git a/email-worker/docker-compose.yml b/email-worker/docker-compose.yml
index 049b037..d18dcce 100644
--- a/email-worker/docker-compose.yml
+++ b/email-worker/docker-compose.yml
@@ -42,7 +42,7 @@ services:
       - SMTP_USE_TLS=false
       
       # Internal SMTP Port (bypasses transport_maps)
-      - INTERNAL_SMTP_PORT=2525
+      - INTERNAL_SMTP_PORT=25
       
       # LMTP (Optional - für direktes Dovecot Delivery)
       - LMTP_ENABLED=${LMTP_ENABLED:-false}