diff --git a/NGINX-Installer.sh b/NGINX-Installer.sh
index 76f8ef2..25a2c04 100644
--- a/NGINX-Installer.sh
+++ b/NGINX-Installer.sh
@@ -88,6 +88,9 @@ sed -i 's/'rtag'/'"${phpver}"'/g' /etc/php/"$phpver"/fpm/pool.d/www.conf
 #    Postfix    #
 ##-------------##
 
+#cheking if postfix already was installed by the system and if yes it wil be removed to prevent config conflicts
+if dpkg-query -Wf'${db:Status-abbrev}' postfix 2>/dev/null | grep -q '^i'; then apt purge -y postfix; fi
+
 debconf-set-selections <<< "postfix postfix/mailname string $domain"
 debconf-set-selections <<< "postfix postfix/main_mailer_type string 'Internet Site'"
 apt install -y mailutils