diff --git a/postfix.sh b/postfix.sh
index 6b6e6ec..e77a79f 100644
--- a/postfix.sh
+++ b/postfix.sh
@@ -5,6 +5,6 @@ postconf -e myhostname="${SUTTY}"
 postconf -e mydomain="${SUTTY}"
 postconf -e smtpd_tls_key_file="/etc/letsencrypt/live/${SUTTY}/privkey.pem"
 postconf -e smtpd_tls_cert_file="/etc/letsencrypt/live/${SUTTY}/fullchain.pem"
-postconf -e mynetworks="127.0.0.0/8 [::1]/128 `ip route | grep -v default | cut -d " " -f 1`"
+postconf -e mynetworks="127.0.0.0/8 [::1]/128 `ip route | grep -v default | cut -d " " -f 1` `ip -6 route | grep -v default | cut -d " " -f 1`"
 
 exec /usr/sbin/postfix start