--- conf/main.cf.orig	2026-05-04 13:06:56 UTC
+++ conf/main.cf
@@ -691,4 +691,8 @@ meta_directory = /etc/postfix
 # between multiple Postfix instances.
 meta_directory = /etc/postfix
 
-inet_protocols = ipv4
+inet_protocols = all
+
+# smtp CA path (default to system-wide location)
+smtp_tls_CApath = /etc/ssl/certs
+