I tried a search on the cc: name - hkliegnan The last letter (r?) is mashed into the @ so hard to tell, and got only minimal results using ‘liegnan’ as last name. Invisible man?
Somewhere out on the interwebs there was a list of people in the podesta organization. It may have been scrubbed somewhere along the way but is bound to be out there cause nothing ever really disappears.
Heather kleigman worked of podesta now works for Microsoft
https://www.linkedin.com/in/heather-kliegman-78533669/