/etc/postfix/main.cf
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postscreen_dnsbl_threshold = 4
postscreen_dnsbl_sites =
  zen.spamhaus.org*3
  bl.mailspike.net*3
  b.barracudacentral.org*2
  bl.spameatingmonkey.net
  bl.spamcop.net
  spamtrap.trblspam.com
  dnsbl.sorbs.net=127.0.0.[2;3;6;7;10]
  ix.dnsbl.manitu.net
  bl.blocklist.de
  #whitelist
  list.dnswl.org=127.0.[0..255].0*-1
  list.dnswl.org=127.0.[0..255].1*-2
  list.dnswl.org=127.0.[0..255].[2..3]*-3
  iadb.isipp.com=127.0.[0..255].[0..255]*-2
  iadb.isipp.com=127.3.100.[6..200]*-2
  wl.mailspike.net=127.0.0.[17;18]*-1
  wl.mailspike.net=127.0.0.[19;20]*-2
Beispiel hafte mail.log
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Mar  5 18:04:35 websrv postfix/postscreen[13865]: CONNECT from [27.76.116.160]:53816
Mar  5 18:04:35 websrv postfix/dnsblog[13866]: addr 27.76.116.160 listed by domain bl.spamcop.net as 127.0.0.2
Mar  5 18:04:35 websrv postfix/dnsblog[13866]: addr 27.76.116.160 listed by domain bl.mailspike.net as 127.0.0.10
Mar  5 18:04:35 websrv postfix/dnsblog[13871]: addr 27.76.116.160 listed by domain ix.dnsbl.manitu.net as 127.0.0.2
Mar  5 18:04:35 websrv postfix/dnsblog[13869]: warning: dnsblog_query: lookup error for DNS query 160.116.76.27.list.dnswl.org: Host or domain name not found. Name service error for name=160.116.76.27.list.dnswl.org type=A: Host not found, try again
Mar  5 18:04:35 websrv postfix/dnsblog[13869]: addr 27.76.116.160 listed by domain zen.spamhaus.org as 127.0.0.3
Mar  5 18:04:35 websrv postfix/dnsblog[13869]: addr 27.76.116.160 listed by domain zen.spamhaus.org as 127.0.0.11
Mar  5 18:04:35 websrv postfix/dnsblog[13869]: addr 27.76.116.160 listed by domain zen.spamhaus.org as 127.0.0.4
Mar  5 18:04:35 websrv postfix/dnsblog[13870]: addr 27.76.116.160 listed by domain spamtrap.trblspam.com as 185.53.179.9
Mar  5 18:04:35 websrv postfix/dnsblog[13867]: addr 27.76.116.160 listed by domain b.barracudacentral.org as 127.0.0.2
Mar  5 18:04:41 websrv postfix/postscreen[13865]: DNSBL rank 11 for [27.76.116.160]:53816
Mar  5 18:04:42 websrv postfix/postscreen[13865]: NOQUEUE: reject: RCPT from [27.76.116.160]:53816: 450 4.7.1 Service unavailable; client [27.76.116.160] blocked using bl.spamcop.net; from=<[email protected]>, to=<[email protected]>, proto=ESMTP, helo=<emailsformoney.com>

Kurze Erklärung der Befehle: postscreen_dnsbl_threshold = 4 stellt den minimalen Wert für ein reject dar.

Gewichtung erklärt
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bl.spamcom.net           1
bl.mailspike.net      3
ix.dnsbl.manitu.net   1
zen.spamhaus.org      3
spamtrap.trblspam.com     1
b.barracudacentral.org    2

Summe:                    11

Nützliche Links: http://mxtoolbox.com/ https://www.dnswl.org/?page_id=15#postfix

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