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A Survival Guide for the Small Mail Server 2015-03-19 UTC
Nowadays many companies and organizations (non-profits, units of governmental and educational institutions, etc) believe that running their own mail servers has become an impossible task, due both to the large amount of inbound spam and to the continuous attempts by spammers to send outbound spam through their mail servers. Companies often lack in-house technical resources to configure and... (>)

The Spamhaus Policy Block List now covers One Billion IP addresses 2014-03-18 UTC
As we always try keep tabs on what spammers do, we couldn't help to overhear this at an Evil Botnet Spam Gang's... (>)

Erroneous Mail Rejections at Yahoo! 2009-05-30 UTC
During the last week of May, 2009, some senders experienced mail rejected by yahoo.com which referenced Spamhaus PBL data. But when they looked up their IP address, it was not in any Spamhaus list. The error was not consistent, and sometimes resubmitting a message might result in its delivery. Yahoo! is aware of the problem and made this announcement on its... (>)

ISP PBL Account - New Look! 2009-05-19 UTC
Last month we mentioned upcoming changes to ISP's PBL Account pages. We're pleased to announce that the first phase of those improvements is now up and running. While not visible to the public, an ISP logging in to their PBL Account will immediately see the upgrades. The new ISP PBL Account pages: Are designed to make it easier for ISPs to make accurate PBL Zone... (>)

PBL Update and Comparisons - April 2009 2009-04-13 UTC
We'd like to show you what some typical broadband space looks like in terms of spam-sending bots and Policy Block List (PBL) listings. Let's sample a few chunks of IPv4 space, count the spam bots, and map them graphically to visualize what those ranges look like. These are just examples, conveniently chosen based on our experience in dealing with countless ISP ranges and PBL listings. There is... (>)

The Spamhaus PBL, a one year old anti-spam heavyweight 2008-01-29 UTC
One year ago this month, Spamhaus launched the Policy Block List, also known as the PBL. Now a year later we look back to see what effect it has had. The PBL was created to be used together with our other DNSBL zones, the SBL and the XBL. At the same time... (>)

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