Procmail handling of spawn_process exit code

Hi all,  
I'm working with a sendmail-8.8.7 on an Linux box RH 5.2.
using procmail v3.10 as LDA. 

Each incoming message is 
- delivered in the standard user maibox mailbox
- handled by a 'filter' 
via .procmailrc specified in the user home directory.

I would like the filter program exit  code to be passed back to
sendmail, so if for instance the filter return temporary failure
(EX_TEMPFAIL) sendmail can queue for later processing

My tests with the the following  recipes 

:0 c
* ^From.*
{
        :0 wr
        | $TEST
}

shows that procmail check the exit code as you see on the log 
attachment but it seem not to pass back to sendmail as no message 
is queued by sendmail.

I' ve even tried to make the 'filter' program to set
the environment variable EXITCODE to '75' ( i.e. the EX_TEMPFAIL )
on exit but this is not solve the problem.

Surely I' m missing something; any help,  suggestions, or pointers to infos,
are greatly appreciated   
 
Thanks a lot in advance  
 
federico 

____________________________________________________________________________
        
Federico Tesei           
Finsiel S.p.A. 
Divisione Tlc 
Via Matteucci, 34/b      
56124 Pisa - Italy               

phone:   +39-(0)50-968-1 (operator) 968-616 (direct)
email: tesei(_at_)tecsiel(_dot_)it 
____________________________________________________________________________


SENDMAIL CF ( local mailer )

Mlocal,         P=/usr/bin/procmail, F=lsDFMAw5:/|@qSPfhn9, S=10/30,
                R=20/40,
                T=DNS/RFC822/X-Unix,
                A=procmail -Y -a $h -d $u


PROCAMAIL LOG

procmail: Assigning "COMSAT=no"
procmail: Assigning "BINROOT=/home/telcal/gymnasium/"
procmail: Assigning "TEST=/home/telcal/gymnasium/PMexit"
procmail: Match on "^From.*"
procmail: Forking "procmail"
procmail: Locking "/var/spool/mail/telcal.lock"
procmail: Assigning "LASTFOLDER=/var/spool/mail/telcal"
procmail: Opening "/var/spool/mail/telcal"
procmail: Acquiring kernel-lock
procmail: Unlocking "/var/spool/mail/telcal.lock"
> From mcert_u1  Mon Feb 28 11:29:56 2000
  Folder: /var/spool/mail/telcal 
    2911
procmail: [13116] Mon Feb 28 11:29:56 2000
procmail: Executing "/home/telcal/gymnasium/PMexit"
procmail: [13116] Mon Feb 28 11:29:56 2000
procmail: Program failure (75) of "/home/telcal/gymnasium/PMexit"
procmail: Assigning "LASTFOLDER=/home/telcal/gymnasium/PMexit"
procmail: Locking "/var/spool/mail/telcal.lock"
procmail: Assigning "LASTFOLDER=/var/spool/mail/telcal"
procmail: Opening "/var/spool/mail/telcal"
procmail: Acquiring kernel-lock
procmail: Unlocking "/var/spool/mail/telcal.lock"
> From mcert_u1  Mon Feb 28 11:29:56 2000
  Folder: /var/spool/mail/telcal 
    2912