All of our servers have been updated to cPanel 78. As part of the upgrade, the SquirrelMail webmail package has been discontinued. For more information about this, please refer to our knowledgebase article, Where is SquirrelMail?
Additionally, MySQL has been upgraded from version 5.6 to 5.7. For most users, there will be no noticeable changes. If you run into any software issues with MySQL, we recommended that you upgrade to the latest version of the software you are running. If you have custom code, you can refer to What's New in MySQL 5.7.