On Mon, 2009-12-14 at 14:24 +0000, Jaroslaw Grzabel wrote:
> Martijn de Munnik wrote:
> 
> > > http://www.postfix.org/ADDRESS_VERIFICATION_README.html#caching
> > >   
> >   
> Hi Martin,
> 
> Thank you for your reply.
> 
> The only problem with that database is that if customer add some users
> into his machine then database will always reject that email... let's
> say for example:
> somebody is spamming address like j...@domain.com
> Obviously jon doesn't exist. But after a week company hire Jon and
> creates an email for him. What postfix does ? Reject all messages until
> I will not be notified and remove the database and let postfix to
> recreate it again.
> That doesn't satisfy me.

That is a problem, you can define different values for cache time for
positive and negative hits. When you keep the negative cache time low
that will not be much of an issue.

> 
> Regards,
> Jarek
> 
> 



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