How can i publish 'total emails sent' and 'total emails delivered' to CRM OD

You can map these two metrics to 2 custom number fields on the Campaign object in CRM OD. To set the values please navigate to Admin->Publish Configuration and click on 'Configure Details' for 'Publish Campaign Activity' option. On the next screen you will see an option to map the 2 metrics 'Total Emails Sent' and 'Total Emails Delivered' to the corresponding fields from the Campaign object in CRM OD. You might have to first add the 2 number fields in CRM OD in case you don't see any fields in ODM.
-Sundeep