Introduction
Slack is one method that can be used to receive notification from cPanel & WHM as a communication type which can be setup at (WHM >> Basic WebHost Manager Setup >> contact information)
Procedure
1. You will need to follow the procedure to create a Slack webhook using the documentation below:
https://api.slack.com/messaging/webhooks#create_a_webhook
2. Once you have the webhook then you can enter it in the slack section at (WHM >> Basic WebHost Manager Setup >> contact information)
3. Test the communication method. The following article shows how to perform this test: How to Test Server Notifications