Make Email - Notifications just "Notifications" (generic setup for notifications, automatic reminders and setting up where do you want to send notifications) and let administrators/users to choose one or more tools/systems where to send the notifications and when.
Review and Approval
Setup - Email - Slack - Workfront App
User story: Marketing manager are not able to use just Workfront for her daily routines. She need to use email for messaging to stakeholders and customers. Marketing manager wan't to see notifications from Workfront in email.
Developer and graphic designer are using Slack for communication within multiple projects. They wan't to see project notifications in their Slack channels. They already use Workfront - Slack integration for content approvals between Workfront and Slack. They need the information (notifications), but they don't want to receive emails.