So, following ManagingDomains - Zimbra :: Wiki, it is fairly trivial to modify an account to become a catch all for a domain...
There is a directive for domains by the name of 'zimbraMailCatchAllAddress'.
(as seen here: ManagingDomains - Zimbra :: Wiki)zimbraMailCatchAllAddress @domain.com
I'm going to test this as soon as I'm done posting here, but is it possible to assign the catchall on the domain level, rather than assigning on the user level?
So the question is, does this work:
I'm off to go test this.