Thank you for the transparency regarding this communication. I saw that you omitted the name of the person that got in contact with you but you left his name on the e-mail. Perhaps it would be better to hide it as well.
This is really not good. With a little research, you get to the guy.
Yeah except he is an IRS agent, not a customer. He could post the whole email if he wanted to as its not really any sort of breach of customer confidentiality. He did the agent a favor by not leaving the email address in there.
Even though it is not from a client, it is still private correspondence. Exposing this email, identifying its origin, unauthorized, is condemnable. And even though we haven't exposed his email, with a little research it's possible to contact him.
I'm not saying he shouldn't share the email he received, just that he should have been more careful.