The list from the fling looks like it is complete. There is a Readme file on the vROps appliance that lists all of the fields here:
/usr/lib/vmware-vcops/user/plugins/outbound/vcops-standard-email-plugin/conf/ReadMe.txt
And some sample templates located in:
/usr/lib/vmware-vcops/user/plugins/outbound/vcops-standard-email-plugin/conf/default_templates/