Hello bdoadmin,
I searched the Knowledgebase and found three articles that may have a solution for this issue:
We haven't made any settings changes to our Xerox devices in years. Scans sent to emails aren't working all of a sudden. No error messages and the machine is showing them as sent successfully - though nothing arrives. I have tried multiple times with organization addresses as well as a personal one - nadda. I checked the device settings and nothing has changed - IP's are going to the right places. Everything network related looks fine in the web portal. Have done several reboots also. Advice? Thank you.