diff --git a/rootfs/etc/confd/templates/main.cf.tmpl b/rootfs/etc/confd/templates/main.cf.tmpl
index b1e871e..a41b77d 100644
--- a/rootfs/etc/confd/templates/main.cf.tmpl
+++ b/rootfs/etc/confd/templates/main.cf.tmpl
@@ -57,7 +57,7 @@ smtpd_tls_auth_only = yes
 smtpd_sasl_tls_security_options = noanonymous
 
 smtpd_relay_restrictions = permit_mynetworks, permit_sasl_authenticated, defer_unauth_destination
-smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, defer_unauth_destination 
+smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, defer_unauth_destination, reject_unverified_recipient
 
 #smtpd_milters={{ getenv "RSPAMD_ADDRESS" "inet:127.0.0.1:11332" }}
 #non_smtpd_milters=$smtpd_milters