Mihaly Zachar via Postfix-users:
> Hi All,
>
> Here is my postscreen section of my config:
>
> # POSTSCREEN
> postscreen_access_list = permit_mynetworks,
> cidr:/etc/postfix/postscreen_access.cidr
> postscreen_denylist_action = enforce
> postscreen_greet_wait = 10s
> postscreen_allowlist_interfaces = !x.x.x.x static:all
> postscreen_greet_action = enforce
> postscreen_dnsbl_threshold = 3
> postscreen_dnsbl_action = enforce
> postscreen_dnsbl_sites =
> zen.spamhaus.org*3
> bl.spamcop.net*3
> dnsbl-1.uceprotect.net*3
> hostkarma.junkemailfilter.com=127.0.0.2*3
> b.barracudacentral.org=127.0.0.[2..11]*2
> dnsbl.sorbs.net*2
> bl.spameatingmonkey.net*2
> bl.spamcop.net*1
> bl.mailspike.net*1
> hostkarma.junkemailfilter.com=127.0.0.3*1
> list.dnswl.org*-5
>
> As you can see, there are no "deep tests" allowed, but sometimes it still
> sends 450 back, like in this case:
>
> May 07 01:59:38 mail postfix/postscreen[7389]: NOQUEUE: reject: RCPT from
> [209.85.221.44]:48443: 450 4.3.2 Service currently unavailable; from=<
> x...@gmail.com>, to=<x...@domain.com>, proto=ESMTP, helo=<
> mail-wr1-f44.google.com>
>
> How this could happen ?
Did you turn on soft_bounce?
Wietse
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