* Vasya Pupkin <postfix-l...@bsrealm.net>:
> Hello.
> 
> I wonder, how postfix handles multiple entries like this:
> 
>   reject_rbl_client hostkarma.junkemailfilter.com=127.0.0.2,
>   reject_rbl_client hostkarma.junkemailfilter.com=127.0.0.4,
> 
> Will it try to lookup address every time, 

No

> or it is smart and will use previous lookup result to compare with next
> address?

Indeed. And that's actually documented 

-- 
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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