ok likely you refer to this Disposition-Notification-To
From what I can tell a Message Disposition Notification does not note any notion of physical location of any server nodes ie no ‘where’ info. But an MDN does note a time associated with when the recipient received the message RFC 3798: Message Disposition Notification
MUA performs requested action and, with user’s permission, sends
an appropriate MDN (“displayed”, “dispatched”, “processed”,
“deleted”, “denied”, or “failed” disposition type, with “manual-
action” and “MDN-sent-manually” or “MDN-sent-automatically”
disposition mode).