[maildropl] Strange error with mail from cron daemon

[<mai...@d-...>]

hi,
i am using maildrop with postfix virtual mailboxes and mysql. it works great but i have one problem left. mail from cron jobs to root cause this error:

---------------------------------------------------------------------------------------------
This is the Postfix 2.x TLS (amavisd/clamav/spamassassin) program at host mail1.d-g-c.de.

I'm sorry to have to inform you that your message could not be
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to <postmaster>

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

			The Postfix 2.x TLS (amavisd/clamav/spamassassin) program

<spl...@d-...> (expanded from <root>): temporary failure. Command output:
    maildrop: Changing to /home/postfix/ Message start at 0 bytes, envelope
    sender=spl...@d-... Tokenized logfile Tokenized string:
    "$HOME$DEFAULT/maildroprc.log" Tokenized ; Tokenized ; Tokenized string:
    `test -e $HOME$DEFAULT` Tokenized ; Tokenized if Tokenized ( Tokenized
    string: "$RETURNCODE" Tokenized != Tokenized string: "0" Tokenized )
    Tokenized ; Tokenized { Tokenized ; Tokenized string: `/usr/bin/maildirmake
    $HOME$DEFAULT` Tokenized ; Tokenized string: `/usr/bin/maildirmake -f
    Junkmail $HOME$DEFAULT` Tokenized ; Tokenized string: `cp
    /home/postfix/.mailfilter $HOME$DEFAULT` Tokenized ; Tokenized string: `cp
    /home/postfix/maildirfilterconfig $HOME$DEFAULT` Tokenized ; Tokenized }
    Tokenized ; Tokenized ; Tokenized ; Tokenized ; Tokenized ; Tokenized ;
    Tokenized include Tokenized string: "$HOME$DEFAULT.mailfilter" Tokenized ;
    Tokenized eof /etc/courier/maildroprc(1): Opening logfile
    /home/postfix/spl...@d-...//maildroprc.log maildrop: Filtering through
    `test -e $HOME$DEFAULT` /etc/courier/maildroprc(4): Evaluating IF
    condition. /etc/courier/maildroprc(4): Operation on: 0 and 0 - not equal,
    result is 0 /etc/courier/maildroprc(4): IF evaluated, result=0
    /etc/courier/maildroprc(16): Opening include file
    /home/postfix/spl...@d-.../.mailfilter Tokenized ; Tokenized ;
    Tokenized ; Tokenized ; Tokenized string: "FROM" Tokenized = Tokenized
    string: 'spl...@d-...' Tokenized ; Tokenized import Tokenized string:
    "SENDER" Tokenized ; Tokenized if Tokenized ( Tokenized string: "$SENDER"
    Tokenized eq Tokenized string: "" Tokenized ) Tokenized ; Tokenized {
    Tokenized ; Tokenized string: "SENDER" Tokenized = Tokenized string:
    "$FROM" Tokenized ; Tokenized } Tokenized ; Tokenized ; Tokenized ;
    Tokenized ; Tokenized ; Tokenized ; Tokenized ; Tokenized ; Tokenized ;
    Tokenized ; Tokenized ; Tokenized if Tokenized ( Tokenized ( Tokenized
    regexp: /^X-Spam-Flag: *YES/ Tokenized ) Tokenized ) Tokenized ; Tokenized
    { Tokenized ; Tokenized to Tokenized string: "$HOME/$DEFAULT/.Junkmail/."
    Tokenized ; Tokenized } Tokenized ; Tokenized ; Tokenized to Tokenized
    string: "$HOME/$DEFAULT" Tokenized ; Tokenized eof
    /home/postfix/spl...@d-.../.mailfilter(5): FROM="spl...@d-..."
    /home/postfix/spl...@d-.../.mailfilter(6): import  "SENDER"
    /home/postfix/spl...@d-.../.mailfilter(7): Evaluating IF condition.
    /home/postfix/spl...@d-.../.mailfilter(7): Operation on:  and  -
    string equal, result is 1 /home/postfix/spl...@d-.../.mailfilter(7):
    IF evaluated, result=1 /home/postfix/spl...@d-.../.mailfilter(9):
    SENDER="spl...@d-..." /home/postfix/spl...@d-.../.mailfilter(21):
    Evaluating IF condition. Start node: 0  Node 17: final  Node 16: 'S'
    transition to 17  Node 15: 'E'     transition to 16  Node 14: 'Y'
    transition to 15  Node 13: null     transition to 12     transition to 14
    Node 12: ' '     transition to 13  Node 11: ':'     transition to 13  Node
    10: 'g'     transition to 11  Node 9: 'a'     transition to 10  Node 8: 'l'
    transition to 9  Node 7: 'F'     transition to 8  Node 6: '-'
    transition to 7  Node 5: 'm'     transition to 6  Node 4: 'a'
    transition to 5  Node 3: 'p'     transition to 4  Node 2: 'S'
    transition to 3  Node 1: '-'     transition to 2  Node 0: 'X'
    transition to 1  Matching /^X-Spam-Flag: *YES/ against Return-Path:
    <ro...@d-...> *** MATCH START *** Matching character: R Failed - out of
    states. Not matched. Matching /^X-Spam-Flag: *YES/ against Received: by
    mail1.d-g-c.de (Postfix 2.x TLS (amavisd/clamav/spamassassin), from userid
    0) id 456E01872D; Tue, 16 Nov 2004 09:10:06 +0100 (CET) *** MATCH START ***
    Matching character: R Failed - out of states. Not matched. Matching
    /^X-Spam-Flag: *YES/ against From: ro...@d-... (Cron Daemon) *** MATCH
    START *** Matching character: F Failed - out of states. Not matched.
    Matching /^X-Spam-Flag: *YES/ against To: ro...@d-... *** MATCH START ***
    Matching character: T Failed - out of states. Not matched. maildrop:
    Timeout quota exceeded.

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mail to root is "aliased" to spl...@d-.... sending an email from the linux shell as user root to ro...@d-... or root ("mail -s TEST root") works fine. only automatic mails from cronjobs cause this behaviour...
any idea whats going wrong?

thx for any help

greetings florian engelmann