Sage advice from both J Pettey and J Hegarty.
I would advise the mail would need to be quite extreme (solicitors and lawsuit territory) to attempt to track down the physical address.
Regardless - if an email is sent from a student address - ultimately they are responsible. Even if they didn’t send it themselves - the same as we all are.
Tracking the physical address (I presume you mean the UID/UUID/MAC address) would be extremely difficult. (not to mention a MAC address isn’t terribly hard to spoof)
As John H has said, the IP address will be the broadband providers address (Public IP) but this will then go to the internal IP - which is almost impossible to find out the actual machine - unless you have access to that person’s router/managed switch/modem… and even then, you’re into an arena of logs/time stamps/cross-referencing, etc… all very difficult and almost certainly not worth it - depending on the situation of course.