* Victor Duchovni <victor.ducho...@morganstanley.com>:
> On Thu, Jun 10, 2010 at 09:50:16AM -0400, Wietse Venema wrote:
> 
> > If the postmaster address is excluded from spam checks then you
> > may want to change the address_verify_sender setting.
> > 
> > The current default is:
> >     address_verify_sender = $double_bounce_sender
> > 
> > The older (problematic) default is
> >     address_verify_sender = postmaster
> > 
> > The final ultimate fix is to make address_verify_sender time-dependent,
> > so that it does not become a spam sink itself.
> 
> Making it time-dependent address_verify_sender may somewhat compound
> issues with grey-listing at the origin domain. It is useful to have a
> value that is stable enough to not repeatedly be subjected to greylisting.

Maybe if it changes once a week (configurable), but the idea is good.

-- 
Ralf Hildebrandt
  Geschäftsbereich IT | Abteilung Netzwerk
  Charité - Universitätsmedizin Berlin
  Campus Benjamin Franklin
  Hindenburgdamm 30 | D-12203 Berlin
  Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962
  ralf.hildebra...@charite.de | http://www.charite.de
            

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