due to legal reasons, we should be able to restore every single mail
without the help of the mailapplication(Zimbra).
Accordig common believe, this is only possible if all elements(mailbody,
attachements and all other meta data) of a mail are named the same
(with different extensions, of course).

What is Zimbra going to do in order to meet those requirements?

Any feedback is appreciated very much. Thank you.