Can someone send you a legitimate court hearing notice by email?

I received a court notice for a different state for a hearing in approx. 2 weeks by email.I am very scared and worried if I'm not present that I would be in contempt of court or something. Looks official, sender states " [email protected] " when I click on who its from. The only reason I've even entertained the idea of someone suing me is because I have received phone calls last year and again recently stating if I didn't pay for a cleaning product I purchased from this Blind Company I would be sent to collections and sued. I've asked them several times to mail me something and that I was not comfortable paying over phone. They were very upset and said they would take it to court. We are talking about a $40 item at the most and they have added a few hundred for back interest.