diff --git a/public/fs/etc/postfix/main.cf.in b/public/fs/etc/postfix/main.cf.in
index 12ddbf2..ea79fe4 100644
--- a/public/fs/etc/postfix/main.cf.in
+++ b/public/fs/etc/postfix/main.cf.in
@@ -59,6 +59,9 @@ smtpd_tls_received_header       = yes
 smtpd_tls_CApath                = /etc/easy-rsa/pki
 smtpd_tls_CAfile                = /etc/easy-rsa/pki/ca.crt
 
+smtpd_relay_restrictions        = permit_mynetworks, permit_tls_all_clientcerts, reject_unauth_destination
+smtpd_recipient_restrictions    = permit_mynetworks, permit_tls_all_clientcerts, reject_unauth_destination
+
 meta_directory                  = /usr/lib/postfix
 setgid_group                    = maildrop
 newaliases_path                 = /usr/bin/newaliases