Tag: blocklists

Blocklist changes

Late last year we wrote about the many problems with SORBS. One of the results of that series of posts was a discussion between a lot of industry professionals and GFI executives. A number of problems were identified with SORBS, some that we didn’t mention on the blog. There was an open and free discussion […]

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Are blocklists always a good decision?

One of the common statements about blocklists is that if they have bad data then no one will use them. This type of optimism is admirable. But sadly, there are folks who make some rather questionable decisions about blocking mail. We publish a list called nofalsenegatives. This list has no website, no description of what […]


You can't always get what you want

It’s a problem anyone who has done any delivery work has faced. There’s a client who is having blocklist problems or ISP delivery problems and they won’t pay any attention to what you say. They insist that you talk to the blocklist or the ISP or hand over contacts directly so they can “dialog with” […]

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Blocklist BCP

As many of you may be aware there is a draft document working its way through the Internet Research Task Force (IRTF) discussing best common practices for blocklists. The IRTF is a parallel organization to the IETF and is charged with long term research related to the Internet. The Anti-Spam Working Group was chartered to […]

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Blocklists, delisting and extortion

As I’m sure many of you have heard by now there is a new blocklist called ‘nszones.’ This blocklist is apparently stealing data from a number of other publicly accessible blocklists, combining the data and then charging folks for delisting. This is a scam attempting to extort money from people. The blocklist has no way […]


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