We have a client who needs to implement some DLP (Data Loss Prevention) features, so we are currently looking to sell them an Office 365 subscription along with the configuration of the rules requested by their security consultant.
That being said, do you know of any open-source solutions we could use in the future that offer, at a minimum, the following DLP features?
Detection of PII (Personally Identifiable Information) in outgoing emails.
Generation of alerts for potential data leaks.
Blocking or quarantining of sensitive messages.
