sieve with reject/redirect/vacation fails, sendmail exit 71

[Razmik Ghanaghounian]

Hi,
I'm getting the following in my /var/log/messages when i send an email 
to someone with sieve redirect or reject or vacation action...

sieve runtime error for dad id 
<430F5861.5050709 at harbourfrontcentre.com>: reject: Sendmail process 
terminated normally, exit status 71

I checked out exit 71 on sendmail <sysexits.h> which is:
#define EX_OSERR        71      /* system error (e.g., can't fork) */

but this does'nt help much. Any other sieve script works fine (ie. 
discard,fileinto). It seems that any action that requires sendmail to 
send to the sender fails.

Any help is appreciated
thanks.