I am desperately in need of a free or low cost email search.?

I have an order of protection against someone and I have been getting suspicious and somewhat threatening emails, I would like to know who they are from.|||take them to a adult and have them bring it to a police station,... all i can tell you there is no email search like that. only police and law enforcement can find ip addresses andstuff liek that. just get pepper spray if legal in your state, never travel alone at night( this ought to be common sense) and if u feel anyoen following u during day make sure u go into a public place with alot of people( never go home! if they don't know adress this is how they find it!) and call a family member a adult u trust.