I also reminded him that contacting me outside of working hours for non-emergencies is actually frowned upon here, and that my contract is for 40 hours, not 40 hours plus nights and weekends. He tried to threaten me with a Performance Improvement Plan. I immediately forwarded the email to our local Dutch HR representative. She literally laughed when she read it and told me to ignore him. She said she would have a "chat" with him about local labor laws. Since then, he hasn't sent a single email after 5 PM. I honestly feel bad for you guys in the US. The fact that you have to apologize for having a life outside of work is insane.
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