I am really not sure what you are describing here. I mean, it is pretty easy to alter the "from" line of an email so it looks like it was coming from someone else. In fact, I get emails at least once a week that appear to come from my domain (e.g.,
[email protected]).
What is unclear is how the law firm ties in with this. Are you saying that it was a fake firm designed to trap you in a marketing pool? Or that the firm did something unlawful?
I suggest that you consult with a lawyer in private if you have concerns here. You can start by calling around to several for a free phone consultation, get some insights then pick the best fit to work with.
Best regards,
Frank
Natoli-Lapin, LLC