[Dovecot] Well, "Hard filesystem quota can also be problematic"

[Jakob Hirsch]

Jeroen Scheerder wrote:

> that may not be there; perhaps file system quota's, along with a solid
> delivery agent (such as procmail) and a strategy of making sure there's
> sufficient storage for mailbox writes by the imap server, as sketched
> before, will suffice?

Don't know if it helps you (didn't even read the whole thread), but
there are MTAs (at least Exim) with builtin delivery and quota handling.