Config for filtering (ignoring) specific mbox mail folders?

Folks:

I'm migrating to Dovecot to provide IMAP services for my personal network.

I have more than a couple of decades of mail in multiple (1000+) mbox mail files, but I don't care to expose all of those to IMAP.

Is there any way to filter out what mail folders Dovecot will LIST and provide access to using globs or regular expressions? I'd prefer to avoid rearranging the mbox files (e.g. to subdirectories) if possible.

I looked through the Dovecot documentation and didn't see anything promising, and I couldn't find any discussion of the topic online. The feature that looked like it might be closest was Namespaces, but I couldn't see how to use that to ignore specific mbox files.

Is there any facility within Dovecot (or a plugin) to filter out / ignore mail folders by name, RE or file glob?

Thanks in advance!

-- John Hardin KA7OHZ http://www.impsec.org/~jhardin/ jhardin@impsec.org pgpk -a jhardin@impsec.org key: 0xB8732E79 -- 2D8C 34F4 6411 F507 136C AF76 D822 E6E6 B873 2E79