diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3007e593..03309dc0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -60,6 +60,7 @@ The **patch** part changes is incremented if multiple releases happen the same m
 * postgresql: fix file postgresql.pref.j2 for exclude package
 * lxc-php: Change lxc container in bookworm for php82
 * evolinux-base: include files under `sshd_config.d`
+* postfix: disable sending mails via IPv6
 
 ### Fixed
 
diff --git a/postfix/templates/packmail_main.cf.j2 b/postfix/templates/packmail_main.cf.j2
index 0d80cf00..65c95866 100644
--- a/postfix/templates/packmail_main.cf.j2
+++ b/postfix/templates/packmail_main.cf.j2
@@ -120,6 +120,9 @@ virtual_mailbox_base = /
 #par defaut, = all
 #inet_interfaces = all
 
+# Envois seulement en IPv4
+inet_protocols = ipv4
+
 # Adresse IP externe du firewall/proxy si derriere NAT ou proxy
 # evite principalement les boucles si MX secondaire et MX primaire indisponible
 #par defaut, =