dovecot - May 2009 - LDA and postfix with recipient delimiter: documentation

Just a comment about the documentation for postfix integration when
using receipient delimiter and delivery  of user+foo at domain.ext to 
user at domain:

http://wiki.dovecot.org/LDA/Postfix

I had some issues to get this working, so thought I'd share my
experience. Dovecot version 1.2.rc3. Postfix version
postfix-2.7-20090511.

I have no local (unix) mailboxes, everything is delivered to dovecot, 
so in postfix I have set mailbox_transport = dovecot. 
In this case the following syntax taken from the docs
does not work:

dovecot   unix  -       n       n       -       -       pipe
  flags=DRhu user=vmail:vmail argv=/usr/lib/dovecot/deliver -f ${sender} -d
${user}@${nexthop}

whereas the following does work:

dovecot   unix  -       n       n       -       -       pipe
  flags=DRhu user=vmail:mail argv=/usr/lib/dovecot/deliver -f ${sender} -d
${user}@${domain}

I think that ${domain} is always what is wanted and only when 
${nexthop} happens to have the same value as ${domain} 
- for example when using a transport table entry like this:

/etc/postfix/transport
domain.ext	dovecot:

will the ${user}@${nexthop} form be deliverable. 
Can anyone see a reason for not using always ${user}@${domain} 
instead of ${user}@${nexthop}?


John

John Fawcett schrieb:
> Just a comment about the documentation for postfix integration when
> using receipient delimiter and delivery  of user+foo at domain.ext to 
> user at domain:
> 
> http://wiki.dovecot.org/LDA/Postfix
> 
> I had some issues to get this working, so thought I'd share my
> experience. Dovecot version 1.2.rc3. Postfix version
> postfix-2.7-20090511.
> 
> I have no local (unix) mailboxes, everything is delivered to dovecot, 
> so in postfix I have set mailbox_transport = dovecot. 
> In this case the following syntax taken from the docs
> does not work:
> 
> dovecot   unix  -       n       n       -       -       pipe
>   flags=DRhu user=vmail:vmail argv=/usr/lib/dovecot/deliver -f ${sender} -d
${user}@${nexthop}
> 
> whereas the following does work:
> 
> dovecot   unix  -       n       n       -       -       pipe
>   flags=DRhu user=vmail:mail argv=/usr/lib/dovecot/deliver -f ${sender} -d
${user}@${domain}
> 
> I think that ${domain} is always what is wanted and only when 
> ${nexthop} happens to have the same value as ${domain} 
> - for example when using a transport table entry like this:
> 
> /etc/postfix/transport
> domain.ext	dovecot:
> 
> will the ${user}@${nexthop} form be deliverable. 
> Can anyone see a reason for not using always ${user}@${domain} 
> instead of ${user}@${nexthop}?
> 
> 
> John
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
Hi John, just for info, in my test server i use

dovecot_destination_recipient_limit = 1
virtual_transport = dovecot

dovecot   unix  -       n       n       -       -       pipe
  flags=DRhu user=vmail:vmail argv=/usr/lib/dovecot/deliver -f ${sender}
-d ${recipient}

without any problems with users full domain layout but without local users
and postfix 2.5.5

currently testing this ( but havent looked about unwanted sideeffects yet)

dovecot   unix  -       n       n       -       -       pipe
  flags=DRhu user=vmail:vmail argv=/usr/bin/spamc -e
/usr/lib/dovecot/deliver -f ${sender} -d ${recipient}

evantually i will use
mailbox_command = procmail -a "$EXTENSION"
vor having an archive with local users later

-- 
Best Regards

MfG Robert Schetterer

Germany/Munich/Bavaria

> John Fawcett schrieb:
>> Just a comment about the documentation for postfix integration when
>> using receipient delimiter and delivery  of user+foo at domain.ext to
>> user at domain:
>>
>> http://wiki.dovecot.org/LDA/Postfix
>>
> Hi John, just for info, in my test server i use
>
> dovecot_destination_recipient_limit = 1
> virtual_transport = dovecot
>
> dovecot   unix  -       n       n       -       -       pipe
>   flags=DRhu user=vmail:vmail argv=/usr/lib/dovecot/deliver -f ${sender}
> -d ${recipient}
>
Hi Robert
thanks for your reply.
Ar you saying that this handles + addresses correctly (i.e.
user+foo at domain.ext delivered to user at domain.ext)?
thanks,
John

john.ml at erba.tv schrieb:
>> John Fawcett schrieb:
>>> Just a comment about the documentation for postfix integration when
>>> using receipient delimiter and delivery  of user+foo at domain.ext
to
>>> user at domain:
>>>
>>> http://wiki.dovecot.org/LDA/Postfix
>>>
>> Hi John, just for info, in my test server i use
>>
>> dovecot_destination_recipient_limit = 1
>> virtual_transport = dovecot
>>
>> dovecot   unix  -       n       n       -       -       pipe
>>   flags=DRhu user=vmail:vmail argv=/usr/lib/dovecot/deliver -f
${sender}
>> -d ${recipient}
>>
> Hi Robert
> thanks for your reply.
> Ar you saying that this handles + addresses correctly (i.e.
> user+foo at domain.ext delivered to user at domain.ext)?
> thanks,
> John
> 
Hi John,
no i didnt wrote that, i only have user at domain.ext
layout in use currently in my test servers

-- 
Best Regards

MfG Robert Schetterer

Germany/Munich/Bavaria

> Hi John,
> no i didnt wrote that, i only have user at domain.ext
> layout in use currently in my test servers
>
> --
> Best Regards
>
> MfG Robert Schetterer
>
> Germany/Munich/Bavaria
>
Hi Robert
I probably didn't make it clear. The problem with the
published syntax is that it does not work for
receipient delimiter and delivery to mailbox, except
as far as I can see when next_hop is the same as
domain, which is not always the case. I think that
the documentation should report the syntax with
${domain} instead of ${next_hop}, unless there's
something I'm missing, since this should always
work.
thanks again
John

On May 18, 2009, at 3:56 AM, John Fawcett wrote:
> Can anyone see a reason for not using always ${user}@${domain}
> instead of ${user}@${nexthop}?
${domain} is a somewhat recent addition to Postfix. I guess the docs  
could say to use ${domain} instead of ${nexthop} if Postfix is newer  
than X (should look up what version added that).