This threatening seems to be just that: a threatening.

You don't have to tolerate it, whatever they will really do, this is E-terrorism.

Report it to:

- your hosting company, by sending them an original copy of the threatening E-mail (with all headers in their original form: transfer as an attachment within any professionnal E-mail client),

- your national security agency or your specialised in IT police department with an original copy of the threatening E-mail.

> The world is a dangerous place to live;
> 

> not because of the people who are evil,
> 

> but because of the people who don't do anything about it.
> 
>                                                                Albert Einstein