It's probably going to be even worse than that - HR (and everyone else) will probably then have to implement process and procedure and storage mechanisms to prove that emails have not been changed. This might mean storing emails in a document control system. Email is bad enough but now we're all going to have to keep a mirror in SharePoint or something like that.

i do this with email from my financial institutions that i care about. i login to their “secure messaging “ portal and grab pdf export of the web page.