diff --git a/dapostinstall.sh b/dapostinstall.sh
index 573f016..daaa828 100644
--- a/dapostinstall.sh
+++ b/dapostinstall.sh
@@ -228,7 +228,7 @@ echo "action=rewrite&value=httpd" >> /usr/local/directadmin/data/task.queue
 cd /usr/local/directadmin/data/templates
 cp dns_a.conf custom/
 cd custom
-perl -pi -e "s/^smtp=\\|IP\\|\n/smtp=\\|IP\\|\n/poczta=\\|IP\\|\n/" /usr/local/directadmin/data/templates/custom/dns_a.conf
+sed -i '/pop/i poczta=|IP|' /usr/local/directadmin/data/templates/custom/dns_a.conf
 
 echo "Instalacja bezpiecznego DMARC"