On Mon, 2007-07-09 at 17:36 +0100, Frank Church wrote:
quota = maildir:storage=10240:messages=1000 .. Looking at the above settings I assume that 10240 Kb or 1000 messages constitute the message limit.
Yes.
Is there an override on a per mailbox setting in the mailbox folder?
By "mailbox" do you mean users or folders? It's a per-user setting, and it's possible to override the global quota by having userdb return a quota field. See the SQL examples in http://wiki.dovecot.org/Quota
Do Postfix and PostfixAdmin also have their custom settings?
The problem doesn't appear to apply at the delivery stage, so it appears to be something respected by dovecot alone.
If you want to enforce quota, use Dovecot's deliver or some other MDA that supports Maildir++ quota. Postfix's internal MDA doesn't.