An example method comprises receiving, by a secure content system, an email from a sender to a recipient, scanning the contents of the email, evaluating the contents of the email based on a plurality of security rules, storing the sensitive data within a secure storage, generating a replacement email including a security link and not including at least the sensitive data, the security link providing a requester access to the sensitive data providing that a security function is satisfied, sending the replacement email including the security link to the recipient, receiving a request to access the sensitive data, the request being related to the security function challenging the requester using the security function, receiving, from the requester, a response to the security function, determining if the security function is satisfied by the response, and if the security function is satisfied, providing access to the sensitive data to the requester.