On December 26/27/2020, the database used for Simplegradebook was updated to MariaDB 10.3, and PHP was updated to version 8. The mail software was upgraded to phpMailer version 6.1.8. Regression testing of the software changes needed to support the upgrades identified a number of previously undetected issues that were corrected. At the same time, the administrator user interface for messaging was improved, and some general upgrades to the messaging system were included in the update.