Where do replies to Update Requests to external parties go?

Kaisha ✭✭
edited 12/09/19 in Smartsheet Basics

I've sent a series of Update Requests to external emails and I've had about 50% response rate.  I have had someone check the validity of the remaining email addresses and we've found several of the email addresses are no longer valid (they don't exist) and several others are issuing Out of Office Notifications.

When I have an Update Request that is initiated by an Action, therefore automated, where does the response go?