You’re absolutely right to want boundaries—it’s essential for your well-being. Try responding to your boss with a polite but clear message, such as: “I’ve noticed work messages coming in after hours. For my own balance, I try to disconnect outside of work. Can we keep communication to work hours unless it’s urgent?” This sets expectations without sounding confrontational. If the pattern continues, consider discussing it with HR or a trusted manager. Remember, protecting your personal time is not unprofessional—it’s healthy.