Great advice, perfect for a start-up coming into existence clean. Then a client emails you their credit card number, and root password for the production envir

Great advice, perfect for a start-up coming into existence clean. Then a client emails you their credit card number, and root password for the production enviro now it's in your inbox, the 3 other employees they CC'd and also in their outbox. Even if we delete it (is it backed up? how many places?) the well has been poisoned. I say this mostly in jest but boy does my email contain some secrets I don't want.