Address extensions and virtual SQL users

Hello,

Is recipient_delimiter supposed to do anything else besides=20
recognizing that a given delimiter is used for address extension ?

I mean, apart from recognizing this fact, should it (or any other=20
Postfix daemon/transport) be capable of delivering messages to an user's=20
subfolder (INBOX.<subfolder>) if an address like=20
<user>+<subfolder>@<virtual_domain> is used ?

I have a Postfix 2.1.5 installation with virtual domains and users=20
in a MySQL database (there's no local user, only virtual) and I would=20
like to be able to deliver messages to a folder like INBOX.Spam if they=20
are sent to <user>+Spam@<virtual_domain> . What I want is exactly what=20
you could see at=20
http://www.ijs.si/software/amavisd/a...s.html#addrext .

I'm not using any external LDA (procmail, maildrop, whatever). I'm=20
only using plain Postfix with virtual users only (no loca users). Also=20
using Courier an Maildir.

If I send a message to <user>+Spam@<virtual_domain> the messages is=20
delivered to the user's INBOX rather than INBOX.Spam .

Does someone have an idea for what I could look for ?

--
Andr=E9 Lu=EDs Lopes