diff --git a/docker-compose.yaml b/docker-compose.yaml
index 648a46d..b739cae 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -49,3 +49,10 @@ services:
       # Optional
       - ${MYVEMAIL_VOLUME_DKIM:-./data/dkim}:/etc/opendkim/keys
       - ${MYVEMAIL_VOLUME_POSTWHITE:-./data/postwhite}:/etc/postfix/postscreen_spf_whitelist.cidr
+
+    networks:
+      - myvemail
+
+networks:
+  myvemail:
+    external: false