diff --git a/docker-compose.yml b/docker-compose.yml
index 86bd0ed..5778f67 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -39,6 +39,8 @@ services:
       - LOGROTATE_COUNT=4
       - ENABLE_SPAMASSASSIN=1
       - ENABLE_SASLAUTHD=1
+      - PERMIT_DOCKER=connected-networks
+      - POSTFIX_INET_PROTOCOLS=ipv4
     cap_add:
       - NET_ADMIN # For Fail2Ban to work
     restart: always
\ No newline at end of file