[Dovecot] quota-warning.sh not working (lda problem?)

[Thomas Krause]

Hi,
I setup a new mailserver with dovecot 2.0.12. Everything is working
fine (including quota) - except of sending quota warning mails.

When running
/usr/local/bin/quota-warning.sh 95 user at domain.de
manually as root or user vmail, the mail is delivered.

content of /usr/local/bin/quota-warning.sh

#!/bin/sh
PERCENT=$1
USER=$2
logger -p mail.info "$PERCENT% Quota-warning sent to $USER"
cat << EOF | /usr/local/libexec/dovecot/dovecot-lda -d $USER -o 
"plugin/quota=maildir:User quota:noenforcing"
From: postmaster at domain.de
Subject: $PERCENT% Mail quota warning
Content-Type: text/plain; charset=ISO-8859-15; format=flowed
Content-Transfer-Encoding: 8bit

Der Speicherplatz Ihres E-Mail-Postfaches ist zu $PERCENT% gefüllt.
Bitte löschen Sie alte und unerwünschte E-Mails vom Server, um den
Emfang neuer E-Mails aufgrund Speicherplatzmangels nicht zu behindern.

Your mailbox with us is now more than $PERCENT% full.
To avoid mail loss due to lack of sufficient space, please remove
old and unwanted mails from the server.
EOF

Because of line 4 of the script I see in maillog, that the script is
executed, but no mail is delivered? Any ideas?

Regards,
Tom.