Ah, Timo, that is what I was thinking of.
> > doveadm expunge -d mailbox '*' not all >
- Deleting empty folders Samuel Williams
- Re: Deleting empty folders Hardy Flor
- Re: Deleting empty folders Samuel Williams
- Re: Deleting empty folders Hardy Flor
- Re: Deleting empty folders Samuel Williams
- Re: Deleting empty folders Bertrand Caplet
- Re: Deleting empty folders @lbutlr
- Re: Deleting empty folders Hardy Flor
- Re: Deleting empty folders Bertrand Caplet
- Re: Deleting empty folders Timo Sirainen
- Re: Deleting empty folders Samuel Williams
