dovecot - Nov 2009 - Why : dovecot_destination_recipient_limit = 1 ?

Hi all,


I'm trying to activate sieve. In all tutorials I have seen I need to set 
dovecot_destination_recipient_limit = 1 in Postfix's main.cf. Can anyone 
explain why ?
I like to know because when I set this and the dovecot transport in 
Postfix, I'm having problems when aliasses are used that map to 
different recipients, i.e. info at ... results in user1 at ..., user2 at ..., 
etc. The problems are an error from Postfix :
Oct 30 09:25:19 lace3 postfix/pipe[19729]: 8A77E2D5B5B: 
to=<some.body at some.where.org>, relay=dovecot, delay=2390, 
delays=2390/0.04/0/0.01, dsn=4.3.5, status=deferred (mail system 
configuration error)
Oct 30 09:25:19 lace3 postfix/pipe[19729]: warning: pipe flag `D' 
requires dovecot_destination_recipient_limit = 1

Thanks for any info.

Regards,

Koenraad Lelong.

Koenraad Lelong:
> I'm trying to activate sieve. In all tutorials I have seen I need to
set
> dovecot_destination_recipient_limit = 1 in Postfix's main.cf. Can
anyone
> explain why ?
> I like to know because when I set this and the dovecot transport in 
> Postfix, I'm having problems when aliasses are used that map to 
> different recipients, i.e. info at ... results in user1 at ..., user2 at
...,
> etc. The problems are an error from Postfix :
> Oct 30 09:25:19 lace3 postfix/pipe[19729]: 8A77E2D5B5B: 
> to=<some.body at some.where.org>, relay=dovecot, delay=2390, 
> delays=2390/0.04/0/0.01, dsn=4.3.5, status=deferred (mail system 
> configuration error)
> Oct 30 09:25:19 lace3 postfix/pipe[19729]: warning: pipe flag `D' 
> requires dovecot_destination_recipient_limit = 1
Well, the last message says it all: you've instructed postifx' pipe to
add a "Delivered-To" header field to the message. And this obviously
can't work when delivering one message to multiple recipients in one pass.
See also:
http://www.postfix.org/pipe.8.html

-- 
Regards
  mks