Out of curiosity: is posting internal company communications (referring to the e-mail here) on a public site like this legal? I'm not saying that it isn't; I genuinely don't know.
It's unlikely a defunct company, run by a convicted guy, employing a person that didn't sign an employment contract (and by extension, a Non Disclosure Agreement) would pay attention to this, much less go after him.
There are exceptions, of course, e.g. revealing trade secrets or insider information on a publicly traded company.