Part 1 of Scott Allen and Mitchell Kusy's The Little Book of Leadership Development: 50 Ways to Bring Out the Leader in Every Employee is about "Development by Modeling Effective Leadership."
One of the suggested practices in that section is about checking in with a "Thought of the Day" and doing so in a way that both onsite (face-to-face) and remote colleagues can easily engage with it.
This suggestion ends with this line "Make this the first task you complete each morning."
What can be automated is a reminder system (e.g., a recurring calendar event) that is placed at the start of the day. What should not be automated is the thought that goes into and composition of the message that goes out.