dovecot - May 2013 - Problem with LDA reject message

Hi to all, i have a problem with LDA when users are quota-full.
My setup is Vpopmail + dovecot + lda; if i send a messagge internally to 
a user with quota full i receive correctly a messagge but in the header 
( i attacch a snip)

 From - Fri May 10 14:42:27 2013
X-Mozilla-Status: 0001
X-Mozilla-Status2: 00000000
X-Mozilla-Keys:
Return-Path: <"<>"@mail.cgilfe.it>

i receive this strange Return-Path.
I the messagge is sent outside other servers reply with this messagge:

Subject: failure notice

Hi. This is the qmail-send program at mail.cgilfe.it.
I'm afraid I wasn't able to deliver your message to the following
addresses.
This is a permanent error; I've given up. Sorry it didn't work out.

<Roberta.Luzzi at filcams.cgil.it>:
Connected to 80.207.169.234 but sender was rejected.
Remote host said: 501 Address Syntax Error in
<"<>"@mail.cgilfe.it>

this is my .qmail-default file:

|/var/qmail/bin/preline -f /usr/local/libexec/dovecot/dovecot-lda -d $EXT@$USER
| /home/vpopmail/bin/vdelivermail "" bounce-no-mailbox

Thanks in advance.


-- 
*Davide Marchi*
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On 10/05/2013 14:47, Davide wrote:
> Hi to all, i have a problem with LDA when users are quota-full.
> My setup is Vpopmail + dovecot + lda; if i send a messagge internally to a
> user with quota full i receive correctly a messagge but in the header ( i
> attacch a snip)
>
> From - Fri May 10 14:42:27 2013
> X-Mozilla-Status: 0001
> X-Mozilla-Status2: 00000000
> X-Mozilla-Keys:
> Return-Path: <"<>"@mail.cgilfe.it>
>
> i receive this strange Return-Path.
> I the messagge is sent outside other servers reply with this messagge:
>
Autodelivey and bounce must have empty return-path


-- 
Simone Caruso
IT Consultant
http://it.linkedin.com/in/simonecaruso/