Redirect to site summary page from email

Hi, 

So I have a process model that sends an email and that email has a link that should redirect to that particular case summary page. Now, my Site has 4 tabs and in one of the tab we have 3 tabs and one of which has the record list of  some XYZ table. In the record list,when clicked on the link of a particular case redirects to the summary view that is an interface created separately which takes the identifier as the input. Now, I am able to get the tempo url but what I need is the site url. Is it possible to get the site url. I tried substituting but didn't work for me. Let me know any kind of solution.

Thanks in advance