I've setup lazy approval but when I test I do not see my workflow being updated with the result.
Inbound email is working on my farm.
When replying back to the workflow request via lazy approval with a yes, I watch my IIS server mail drop box and see the message arrive. I also see the message being picked up by SharePoint as it disappears from the mail drop folder.
SharePoint 2013 Enterprise
Nintex Workflow 2013 Standard