Single multi-role server with a couple of mailboxes, recently added an Edge Transport server. After configuring the Edge Subscribtion I added sen.spamhaus.org as a RBL Provider:
Add-IPBlockListProvider -Name Spamhaus -LookupDomain zen.spamhaus.org
This is not working. A lot of spam is still entering Exchange and the http://www.crynwr.com/spam/ test failed.
Both servers run Exchange 2013 CU5.
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