How to enable spam block list on exchange sever 2013?

In a continued effort to fight spam, here is a very simple way to decrease the amount of spam received on your exchange servers.

What is a spam block list ?

A spam block list is a list of IP adresses that has been identified for abuse. Usualy maintained by non-profit organisations that help to reduce global spam by providing security intelligence databases for everyone to use.

How do i enable spam block lists to my exchange server ?

It is very simple for anyone to enable spam blocking list, we have regrouped different blocking list that we use in production and built their corresponding cmdlets.

Open a exchange powershell

Run the following cmdlets

Add-IPBlockListProvider -name zen.spamhaus.org -lookupdomain zen.spamhaus.org
Add-IPBlockListProvider -name bb.barracudacentral.org -lookupdomain bb.barracudacentral.org
Add-IPBlockListProvider -name ix.dnsbl.manitu.net -lookupdomain ix.dnsbl.manitu.net
Add-IPBlockListProvider -name bl.spamcop.net -lookupdomain bl.spamcop.net
Add-IPBlockListProvider -name combined.njabl.org -lookupdomain combined.njabl.org
Add-IPBlockListProvider -Name dnsbl.sorbs.net -LookupDomain dnsbl.sorbs.net
Add-IPBlockListProvider -Name cbl.abuseat.org -LookupDomain cbl.abuseat.org
Add-IPBlockListProvider -Name spam.dnsbl.sorbs.net -LookupDomain spam.dnsbl.sorbs.net
Add-IPBlockListProvider -Name spam.rbl.msrbl.net -LookupDomain spam.rbl.msrbl.net
Add-IPBlockListProvider -Name bl.spamcannibal.org -LookupDomain bl.spamcannibal.org
Add-IPBlockListProvider -Name psbl.surriel.com -LookupDomain psbl.surriel.com

How do i know it worked ?

Open a exchange powershell and Run the following cmdlet

get-IPBlockListProvider

You should get an output like

Name                                    LookupDomain                            Priority
—-                                    ————                            ——–
zen.spamhaus.org                        zen.spamhaus.org                        1
bb.barracudacentral.org                 bb.barracudacentral.org                 2
ix.dnsbl.manitu.net                     ix.dnsbl.manitu.net                     3
bl.spamcop.net                          bl.spamcop.net                          4
combined.njabl.org                      combined.njabl.org                      5
dnsbl.sorbs.net                         dnsbl.sorbs.net                         6
cbl.abuseat.org                         cbl.abuseat.org                         7
spam.dnsbl.sorbs.net                    spam.dnsbl.sorbs.net                    8
spam.rbl.msrbl.net                      spam.rbl.msrbl.net                      9
bl.spamcannibal.org                     bl.spamcannibal.org                     10
psbl.surriel.com                        psbl.surriel.com                        11

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