[Dovecot] using Lazy_Expunge to enforce retention policy

[Frank Cusack]

On 7/25/10 3:37 PM -0400 Jim Salter wrote:
> How can I use Lazy_Expunge to completely PREVENT users from deleting
> email permanently?

Don't list the namespace at all.  Users then will not be able to get
to it.

Alternatively, create an ACL denying delete/expunge permission.  Then
users can still access the deleted mail.