[Dovecot] [SIEVE: Redirect] Double ">" in forwarded envelop sender address => Gmail syntax error

[Toorop]

Hi,

Plateform: gentoo + qmail

My deliver line is in a .qmail-USER file:
|/var/qmail/bin/preline /usr/libexec/dovecot/deliver -f ${SENDER:-<>} -d 
user at domain.tld

I notice that sieve implementation in Dovecot use double ">" for the 
envelop sender when there is a redirect command in sieve script.
(i've tried preline -f, without -f ${SENDER:-<>},... but nothing change 
for the the envelop sender syntax, alway the double ">")

And that fact breaks forwardin to Gmail.
Gmail reply that there is a syntax error probably due to the double "<<" 
(<<address>> and not <address>) as we can see in the log behind:


Dovecot logs:
deliver(stephane at XXXX): Apr 20 16:06:44 Info: Sending a forward to 
<XXXX at gmail.com> with return path <<stephane at XXXXXX>>
deliver(stephane at XXXXX: Apr 20 16:06:44 Info: 
msgid=<49EC816D.9090403 at XXXXX.com>: forwarded to <XXXXX at gmail.com>

qmail-send logs:
2009-04-20 16:06:44.877793500 info msg 14815541: bytes 1290 from 
<<stephane at XXXXX.com>> qp 17780 uid 89
2009-04-20 16:06:44.892303500 starting delivery 6356: msg 14815541 to 
remote XXXXX at gmail.com
2009-04-20 16:06:44.982424500 delivery 6356: failure: 
Connected_to_209.85.219.1_but_sender_was_rejected./Remote_host_said:_555_5.5.2_Syntax_error._1si7169155ewy.101/
2009-04-20 16:06:44.982502500 status: local 0/10 remote 0/80

Is there something to do to fix that probleme ?

Thanks.

-- 
Toorop <O> http://www.flickr.com/photos/toorop/