[Dovecot] mbox vs maildir

[Jim Pazarena]

I've had clients 'request' nested folders, and it would seem that
maildir is designed with that ability while with mbox it is difficult
and.or impossible to implement (nested can be achieved; but not nested
AND populated in each nest level).

My question is, is one format 'better' than the other? It would
take a fair bit of time to convert my system to maildir and I would
want to feel comfortable that this would be a true 'upgrade' in
abilities, rather than simply a change to accommodate nested folders.

Thanks,