[Dovecot] Why : dovecot_destination_recipient_limit = 1 ?

[Noel Jones]

On Tue, Nov 3, 2009 at 6:29 AM, Koenraad Lelong
<dovecot at ace-electronics.be> wrote:
> Markus Schönhaber schreef:
>>
>> 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
>>
> Thanks for your response, Markus.
> Am I to conclude that what I'm trying to do is impossible then, with dovecot
> ?
> I would like to enable sieve on a system where I have aliasses which point
> to multiple recipients.
> For some reason dovecot needs the DRhu flags. The D flag needs
> dovecot_destination_recipient_limit=1 which prevents those multiple
> recipients.
>
> Or am I missing something ?

dovecot_destination_recipeint_limit=1 tells postfix to deliver
recipients one at a time; multiple recipients still work fine, just
requires multiple deliveries.

Sounds like you're trying to solve a problem that doesn't exist.

  -- Noel Jones