Salesforce Email Trigger

I'm attempting to have a setup where when a case is closed in Salesforce, it triggers an email to the Delta Contact with a link to take a short survey. I've been trying to set this up from the Actions menu. I followed all the steps from the website on setting this up and it still doesn't work properly. We would like the link to expire after 1 day. However after testing, I've been able to access the link after 1 day anyways. I reached out to ask why and they said because the link being sent is anonymous and those aren't designed to expire at all which doesn't help me. How am I supposed to set this up so the link isn't anonymous? The screenshot they keep referring me to is the Distribution list to show me a message that says "Distributions with anonymous links do not support reminder and thank you messages" which also means it won't expire. How do I get this set up properly?