I guess that such state of the email can be attributed to the structure of that company (and all large organizations in general), not to the email itself.
In my opinion it is down to policies and tactics like CYI (Cover Your Ass), micromanagement, dictatorship, "I know it better than techies",
If those are not addressed, nothing will be solved. And any new communication medium which will be chosen to replace email will be killed in short future too.
Maybe we can also look at "paperless office" to learn the same.