Who sent the mailing?

Hi

When you create a mailing, in the first step, “1 Setup”, you have the option to select “Always use”, “Use our contact where specified, otherwise use:” or “Use our support contact where specified, otherwise use:” in the From field.

How do you know which option was selected after the mailing has been sent?

How do you know who sent the mailing to each participant? ie. was the Our Contact used and if so who was it?

I'm guessing at least the first question must be stored somewhere (in the database?) since you often choose to send the mailing at a later date and time but I can't find the setting anywhere, unless it is an undocumented flag, maybe in s_shipment?

Any assistance gratefully received!