Impossible to move messages to trash when overquota

[Dave O]

On Thu, 2 Jan 2003, Scott Russell wrote:

> On Thu, Jan 02, 2003 at 10:17:28AM -0000, tosi at hi.is wrote:
> > > This has come up before. The move command is actually a two step
> > > operation where the file is first copied to the 'Trash' folder and then
> > > deleted from the source directory. The copy operation fails
> > > because the user is over quota.
> > >
> >
> > Since the mailbox is all on the same filesystem, why not use hard links to
> > move the file when the move command is used, like sendmail does, instead
> > of copy and delete ? It would give better performance, and take care of
> > the overquota problem.
>
> There is no 'move' command in the IMAP RFC iirc. A 'move' operation is
> just client side semantics for 'copy and then delete'.
>

Then why not use the hard links (essentially the same as SIS delivery) for
IMAP copy?