As messaged to the Karmasphere-Users and Karmasphere-Announce mailing lists, the Karmasphere Reputation Services data feeds are being retired. This means that the associated blocking list(s), including the karmasphere.email-sender.dnsbl.karmasphere.com DNSBL zone, and any other DNSBL/DNSWL zones under karmasphere.com. It is unclear to the author if karmasphere.org is similarly affected.
Karmasphere has indicated that the feed service will be discontinued on November 16, 2009. It's very important that all Karmasphere-using mail administrators remove any Karmasphere-hosted DNSBLs from their configuration before that date, else inbound receipt of legitimate email messages could be delayed or otherwise impacted.
For more information, click on over to Spam Resource to read a copy of the Karmasphere notice.
All about DNSBLs, aka blocklists/blacklists // Since 2001 // Published by Al Iverson
| Thanks for visiting! Remember that nowadays, (most) blocklists don't usually govern deliverability and inbox placement on their own. Want to learn more about email marketing best practices, email technology, and deliverability troubleshooting? Then you'll want to check out my other site, Spam Resource. |
Status of rbl.cluecentral.net: DEAD
The rbl.cluecentral.net DNSBLs were created in 2001 or 2002 by Sabri Berisha. The goal: To list "all known assigned IPv4 address space, by originating AS and by country. [This is based on] a full routing view is extracted daily from a router in the default free zone. The AS->country mapping is done via the statistics which are being provided by the four RIR's, ARIN, APNIC, LACNIC and RIPE."
Today, the website warns that the rbl.cluecentral.net service is closed. Sabri notes that "[it has become] more and more difficult and time-consuming to maintain a trustworthy list I started to notice more and more errors. The list is no longer of the quality needed to use in a production environment."
The website warns that if DNS queries continue at a high level, the DNS servers are likely to be configured in a way that will cause 100% of inbound mail attempts to be rejected, for all mail servers still using rbl.cluecentral.net. This makes it imperative that you remove any rbl.cluecentral.net zones from your mail server configuration, as soon as possible.
Today, the website warns that the rbl.cluecentral.net service is closed. Sabri notes that "[it has become] more and more difficult and time-consuming to maintain a trustworthy list I started to notice more and more errors. The list is no longer of the quality needed to use in a production environment."
The website warns that if DNS queries continue at a high level, the DNS servers are likely to be configured in a way that will cause 100% of inbound mail attempts to be rejected, for all mail servers still using rbl.cluecentral.net. This makes it imperative that you remove any rbl.cluecentral.net zones from your mail server configuration, as soon as possible.
Status of blackholes.us: DEAD
Created by Matthew Evans in 2002, the goal of the blackholes.us site was "to create (yet more) DNS blocklists of spammers, spam supporting ISPs, spamware hosts, dialup networks, and other notorious email abusers originating in the United States." Matthew published many different DNSBL zones, listing various countries, ISPs, netblocks, etc.
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