From: Alain Spineux (aspineuxgmail.com)
Date: Sun Jul 08 2007 - 09:13:09 CDT

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On 7/8/07, Wietse Venema <wietseporcupine.org> wrote:
> Alain Spineux:
> > On 7/7/07, Wietse Venema <wietseporcupine.org> wrote:
> > > Alain Spineux:
> > > > The last part of
> > > > http://www.postfix.org/SMTPD_PROXY_README.html
> > > > is about "How Postfix talks to the before-queue content filter"
> > > >
> > > > Do these rules apply to the AFTER queue filter too ?
> > >
> > > No. The AFTER-queue filter is described in FILTER_README.
> >
> > Yes !
> > The filter is "called" by smtp (the postfix smtp clien) and then this
> > connection can be tuned
> > using all the options supported by the client ( man smtp )
> >
> > I dont see any way to limit the number of deliveries per connection to
> > one like for the Before Queue Filter.
>
> Such as?

option that do about the same as smtp_connection_cache_time_limit or
smtp_connection_reuse_time_limit, but that limit the number of
deliveries.
The option could be named :

smtp_connection_deliveries_limit (default:0)
  limit the number of deliveries per connection, 0 mean no limits,
except the limits set
  by smtp_connection_cache_time_limit, smtp_connection_reuse_time_limit.

>
> > This could make filtering more robust by shadowing some filter weakness.
>
> Such as?

A week filter could keep some information about sender, recipients or
xforward info from
deliveries to deliveries instead of resetting them at good time.
Guaranty to make only one try will reduce the requirement of the
filter and qualify a BQ filter into a without any change AQ filter.
Of course a BQ filter dont need to be weak to be a good one.
And yes the filter could close the connection after the first delivery.
But what if the filter don know about its weakness.

Regards
Alain

>
> Wietse
>

--
--
Alain Spineux
aspineux gmail com
May the sources be with you

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