/etc/pmta/license You can also define the license path inside pmta configuration file using the directive:

tail -f /var/log/pmta/pmta.log A successful validation will show:

pmta status Or inspect the log file:

If you need a new license key or have lost your existing one, contact or your reseller with your order ID and server MAC address. Disclaimer: This article is for informational purposes. PowerMTA and SparkPost are trademarks of their respective owners. Always refer to official documentation for licensing policies.