Phony subpoena? Scary phishing message?

I received an e-mail telling me that I’m subpoenaed to appear in court in my city next week. It contains several errors, and I can’t find the sender’s name or the supposed judge’s name in local online sources.

It doesn’t tell me what the summons is for but speaks of “your case” and alludes to a website that I own. There’s no indication of whether I’m supposedly on the plaintiff or defendant side or what I might be asked to speak about; there is a presumed case number that doesn’t bring up any results on Google.

Do genuine subpoenas ever come by e-mail? Must they be served in person? Is there certain information that they must contain? What kind of tipoff can I rely on to say that this is bogus and I can ignore it?

I’m sure I sound naive. I know enough to disregard threatening phone calls from speakers with Indian accents who say that the IRS is going to sue me or that my Windows computer is calling for help. But I’ve never seen one like this before, and yes, it does scare me.

There’s an 800 phone number, but I’m not calling it. When I googled it, I didn’t get a direct hit, but a group of numbers came up in sites whose Google snippets include a lot of Chinese characters.

If it is phishing, what could the sender be after? How would this ruse accomplish it?