An updated version would say to make sure every email address you use/show in the application/terms/policies are usable and someone receives it.

When reviewing stuff that introduces new emails and whatnot I always spend 10-20 seconds sending an email with "Please respond if you see this" to verify it actually works and someone receives it, as I've experienced more than once that no one actually setup the email before deploying the changes that will show the email to users.