Email is often "production data" -- it contains personal data, IP, business relationship information and so on. Sending an email from an @coinbase.com is certainly a production action.
It is only fairly recently that locking people out of the office didn't implicitly remove their access to email, memos, letters and so on.
It is only fairly recently that locking people out of the office didn't implicitly remove their access to email, memos, letters and so on.