u/Several-Technician21

So someone pretended to be a journalist and sent a fraudulent email to my directors alleging bribery and corruption. Whoever sent this deliberately mis-represented facts with a clear intent to defame. I'm assuming it's someone I know who is trying to malign my reputation. I can't think of any other reason for this. Would there be a way to find out who sent this mail?

Can share the address but I assume it might be against some rules here. Essentially looking for suggestions on how to deal with such nuisance.