[Dovecot] dovecot-lda not correct folder

Hello,

i use dovecot with maildir. The maildir-folder looks like this:

vmail/mail/user1/cur vmail/mail/user1/.Sent vmail/mail/user1/.optionalfolder

Procmail should put some definded mails in the "optionalfolder"

My uses configuration does not do this:

... DELIVERMAIL="/usr/lib/dovecot/dovecot-lda" IMAP="$DELIVERMAIL -e -d $LOGNAME -m INBOX" ZUSATZORDNER="$DELIVERMAIL -e -d $LOGNAME -m .optionalfolder" ...

dovecot-lda puts the mails for the optionalfolder always in the .cur (INBOX).

What´s the correct dovecot-lda parameter to put the mails in the optionalfolder?

Thank you!

Tony