On Wed, 2007-01-31 at 14:04 -0500, Mikhail Teterin wrote:

Hello!

I have the following three types of mailboxes on my server:

1. Regular user mail /var/mail/<user> in mbox format
2. Suspected spam in /var/tmp/spamprobe in mbox format
3. Archived mailing list in /home/mks/mksarch in mbox format

I want the 1) to be only accessible to the respective <user>, obviously (POP3 and/or IMAP4).

I wanted the 2) to be accessible to all users -- and I want them to be able to move stuff out of it into their own mboxes (IMAP4 is enough).

Create a new namespace for it. Something like:

namespace public { prefix = Public/ location = mbox:/var/tmp }

That gives access to everything in /var/tmp though. Otherwise you'll have to do something like:

namespace public { prefix = spamprobe/ location = mbox:/var/tmp/dovecot-public-home:INBOX=/var/tmp/spamprobe }

However then the mailbox is called spamprobe/INBOX.

I want the 3) to be accessible _read only_ to anyone, who enters the correct username/password (preferably -- without creating a special Unix account). (IMAP4 or POP3)

You can create a namespace like above and then use ACL plugin to make it read-only. But there's no way to give any extra username/passwords, IMAP protocol doesn't support that. You could make ACL file which makes it read-only to specific list of users.