The MailChimp autoresponse is triggered when you press the blue button at the end of each email you receive.
This makes learning your decision. You control when to prompt the next microlearning resource.
I have preset the MailChimp autoresponse to reply to you immediately after you have pressed the blue button. You should be hearing about Open Educational Resources (OERs) soon.
Spire of Dublin (Keith Lyons, CC BY 4.0)