Now you have three options:Directly send scheduled or recurring emails using Courier: Call the sendEnhancedNotification() function from the Courier PHP SDK, and use a third party task scheduling library called Crunz to deal with the scheduling side of things. This works using cron syntax, so the same principle can be used for scheduled or recurring emails.Use Courier’s automations to add send logic to your scheduled emails: An automation in Courier is a way of chaining together different steps such as the sending of emails (or other notification-related logic) so that the steps happen in a particular order. An automation can be run by calling the invokeAutomation()function, and as with option 1, you can use Crunz to deal with the scheduling.Using Courier’s no-code automations designer: This is a no-code GUI tool in the Courier UI that uses a drag-and-drop canvas to build up your notification logic. It contains some more advanced logic than option 2 (such as the ability to create email digests or batching).