We would like to have a common error handling framework a/c all business processes. Atleast be able to reuse notification objects, etc.
Does it make sense to install Mail Adapter as its own software product/component.
Additional general question: How is error handling and notification handle in other companies.
use the runtime workbench and CCMS. There you can integrate mailmessages in case of errors on different occasions.
Please check: http://service.sap.com/netweaver -> Media Library -> How-to Guides -> Exchange Infrastructure
for How-to guides and the onlinedocumentation.
One How-to for CCMS already exists and another one on xi monitoring in general is under way.