On Wed, 19 Dec 2018 at 14:51, Matus UHLAR - fantomas <uh...@fantomas.sk>
wrote:

> On 19.12.18 14:00, Stefan Bauer wrote:
> >Dec 19 13:04:36 mx1 postfix/postscreen[4770]: CONNECT from
> >[209.85.166.196]:52168 to [public-ip]:25
> >Dec 19 13:04:42 mx1 postfix/dnsblog[4774]: addr 209.85.166.196 listed by
> >domain dnsbl.sorbs.net as 127.0.0.6
> >Dec 19 13:04:42 mx1 postfix/postscreen[4770]: PASS NEW
> >[209.85.166.196]:52168
> >Dec 19 13:04:42 mx1 postfix/smtpd[4778]: connect from
> >mail-it1-f196.google.com[209.85.166.196]
> >
> >why did google pass postscreen even though its listed in one of the RBL?
> >
> >
> >postscreen_dnsbl_sites = zen.spamhaus.org*2 bl.spamcop.net*1
> >b.barracudacentral.org*1 dnsbl.sorbs.net*1
> >postscreen_blacklist_action = drop
> >postscreen_dnsbl_action = enforce
> >
> >Am i missing something obvious?
>
> on some systems I have implemented postscreen with especially to avoid
> refusing
> mail just because of a single dnsbl listing.
>
> on some systems the google ranges are whitelisted.
>

This might help OP identify any non-default postscreen settings (kudos:
Viktor) -

LC_ALL=C join --check-order <(postconf -n) <(postconf -d | sed
's/=/(default:/; s/$/)/')|grep ^postscreen_

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