diff --git a/target/start-mailserver.sh b/target/start-mailserver.sh
index 9f305edd..84012933 100644
--- a/target/start-mailserver.sh
+++ b/target/start-mailserver.sh
@@ -658,7 +658,7 @@ function _setup_spoof_protection () {
 	sed -i 's|smtpd_sender_restrictions =|smtpd_sender_restrictions = reject_authenticated_sender_login_mismatch,|' /etc/postfix/main.cf
 	[ "$ENABLE_LDAP" = 1 ] \
 		&& postconf -e "smtpd_sender_login_maps=ldap:/etc/postfix/ldap-users.cf ldap:/etc/postfix/ldap-aliases.cf ldap:/etc/postfix/ldap-groups.cf" \
-		|| postconf -e "smtpd_sender_login_maps=texthash:/etc/postfix/virtual, hash:/etc/aliases, pcre:/etc/postfix/maps/sender_login_maps.pcre"
+		|| postconf -e "smtpd_sender_login_maps=texthash:/etc/postfix/virtual, hash:/etc/aliases, pcre:/etc/postfix/regexp, pcre:/etc/postfix/maps/sender_login_maps.pcre"
 }
 
 function _setup_postfix_access_control() {