Mailbox Alias

Hello, I have dovecot with Outlook and Roundcube in the employment and with me the Mailboxaliase does not work.

The folders are still different and each client creates its own. I thought that the aliases then fell away. Even on a new test system is not.

local.conf:

namespace inbox {

mailbox Sent {

auto = create # or subscribe

special_use = \Sent

}

mailbox Trash {

auto = create

special_use = \Trash

}

}

mail_plugins = $mail_plugins mailbox_alias

plugin {

mailbox_alias_old = Trash

mailbox_alias_new = Deleted

mailbox_alias_old2 = Sent

mailbox_alias_new2 = Sendet

mailbox_alias_old3 = Trash

mailbox_alias_new3 = Gel&APY-schte Elemente

mailbox_alias_old4 = Sent

mailbox_alias_new4 = Gesendete Elemente

mailbox_alias_old5 = Trash

mailbox_alias_new5 = Trasher

mailbox_alias_old6 = Sent

mailbox_alias_new6 = Sender

}

Does somebody has any idea? Tanks for all.