Postal continue to supports the Edition one (or legacy) configuration structure from Postal v2 and earlier. Should you be working with this config file, you are going to get a warning during the logs when commencing Postal. We propose Altering your configuration to Adhere to the new v2 structure https://beaunzkmz.pointblog.net/not-known-factual-statements-about-magento-2-optimization-67827049