* Forward copies of emails to the company's leadership/HR department.
* Keep printed copies of the emails handy in case he decides to retaliate with lawyers.
* Keep your own legal counsel on speed-dial.
* Move on with your life.
There's not much you can do from a legal standpoint, with regards to grievance/redress. Escalating the situation through contacting his boss/HR carries a risk, even though you have the moral high-ground, but it could work in getting him punished. Or it could achieve absolutely nothing.
Or he has a long history of this abusive behavior and this is the last straw that will get him ejected from the company for being a serious liability/generally unpleasant.
He has your resume, and he's exhibited awful behavior -- legal counsel should definitely be at your disposal on a moments notice.
Naturally, if it really interests you, you can consult a lawyer to verify whether there are any punitive measures you can apply against him. The OP hasn't indicated that the guy has harassed her per se, so I don't know if she has any legal standing regarding that.