it’s always a push and pull kind-of thing. if you answer your email after hours you will receive emails after hours. if you work on your free time more work is going to show up on your plate. as with everything in life having boundaries is a must. if your boss makes you work nights or weekends make sure this is explicitly done (ie have them ask you formally) and ask for a raise to compensate for your time. if they don’t back off find another job.