Is it possible to have an email alert fired from Salesforce contain a Button, and then for that Button to send a response back to Salesforce if clicked? This would be used in a Case/Ticket situation asking the Client for their approval or not. When they click the button, we have the Case.ThreadId in the email sent back to Salesforce and it will let us update the Ticket.
So, I'm not looking for this to be done for me... but is this even remotely possible?
Does this need to be something that calls a server and then that server updates SFDC? Or is this something we can do using just HTML?
Any insights to the best practice way for me to tackle this would be great. I've not dove this deep before in this area. I've been trying to use "Mailto:"