Postal continue to supports the Variation one (or legacy) configuration structure from Postal v2 and before. If you're making use of this config file, you might receive a warning from the logs when starting off Postal. We suggest changing your configuration to Adhere to the new v2 structure that https://mautic-installation89099.madmouseblog.com/7269980/what-does-office-365-smtp-setup-mean