The notification history auditing view enables limited 'recent' history, where traffic
An example of its usage would for 'testing' you could validate mails were sent to particular parties for particular actions. 
We don't yet have support to view content sent.
Filtering this view (e.g. by Issue / user / recipient) is an open feature JEMH-7101 - Getting issue details... STATUS
Actions
Delete
You can delete an item.
View Recipients
Where the recipient list is long, you can see the full recipient list.