Xavier Maillard wrote:

Hi,

I am using SIEVE to filter/sort my incoming mails.

I am subscribed to tens of mailing lists and I would like to file messages into folder of this pattern:

INBOX/list/<tld>/<domain name>/<list name>

So for example help-gnu-emacs@gnu.org would be filed under:

INBOX/list/org/gnu/help-gnu-emacs

The problem is Dovecot is telling me that this mailbox name is invalid.

What can I do ?

Folders are dot-separated, not slash-separated (i.e., INBOX.list.org.gnu.help-gnu-emacs).