To provide a continually improved email delivery cloud solution, we have made some enhancements to our Email Cloud solution connected with Sitecore Email Experience Manager. We are moving towards an architecture that separates major components such as message delivery, reporting, and suppression services into dedicated service tiers. The changes provide performance improvements to suppression list lookup and data reporting. As a part of these improvements, some configuration changes are required for all Email Delivery Cloud users within the next few months. Please refer to the following Solution section for details.