I've just noticed when inspecting a profile record, that they have recieved proofs.
The "address" of the sending logs is an internal email address.
But the sending logs of main deliveries have the profile's email address.
I can also see tracking logs for the profile associated to the proof delivery.
So my question is, when using the Profile Substitution feature - are sending and tracking logs for the proofing stored against the profile selected for the substitution.
It very much looks like this is the case!!!