We are working with two outbound providers on our on-premise Exchange 2013 environment: ProofPoint which provides encryption on demand and Mailjet which gives us detailed deliverability stats and reports. Unfortunately, we're stuck with using one or the other, mainly because Mailjet has authentication requirements that ProofPoint's configuration can't meet. So, is there a way to configure Exchange so that all messages with the "[ENCRYPT]" in the Subject or Body would go through the ProofPoint connector and anything else through the Mailjet one? Ideally, if we could find a provider that gives both the reporting AND the encryption-on-demand, that would probably be the optimal option. Thanks!