diff --git a/rootfs/etc/confd/templates/main.cf.tmpl b/rootfs/etc/confd/templates/main.cf.tmpl
index 37aaeb6..e3c6081 100644
--- a/rootfs/etc/confd/templates/main.cf.tmpl
+++ b/rootfs/etc/confd/templates/main.cf.tmpl
@@ -63,7 +63,10 @@ smtpd_relay_restrictions = permit_mynetworks, permit_sasl_authenticated, defer_u
 smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, defer_unauth_destination, reject_unverified_recipient
 
 smtpd_sender_restrictions = reject_sender_login_mismatch
-smtpd_sender_login_maps = pgsql:/etc/postfix/pgsql-login-maps.cf
+smtpd_sender_login_maps = unionmap:{
+	$virtual_mailbox_maps,
+	pgsql:/etc/postfix/pgsql-login-maps.cf
+}
 
 smtpd_milters={{getenv "RSPAMD_ADDRESS" "inet:127.0.0.1:11332"}}
 non_smtpd_milters=$smtpd_milters