http://tom.knaupp.com/2008/03/05/should-i-use-dnsbl/ free software, security and a bunch of my strange thoughts Sun, 30 May 2010 16:22:32 +0000 hourly 1 http://wordpress.org/?v=3.0 http://tom.knaupp.com/2008/03/05/should-i-use-dnsbl/comment-page-1/#comment-100 tom Mon, 26 May 2008 20:24:27 +0000 http://tom.knaupp.com/2008/03/05/should-i-use-dnsbl/#comment-100 Steffen, thanks for the tip. I'm using BATV for some servers already. The problem is (afaik), it only works when the server is used for receiving AND sending mails (because a "secret" is added while sending mail which in turn is filtered when getting the bounce). So it doesn't work for servers that "just" do spam filtering for incoming mails (like backup MXs or some UCE filters)... Steffen, thanks for the tip.
I’m using BATV for some servers already. The problem is (afaik), it only works when the server is used for receiving AND sending mails (because a “secret” is added while sending mail which in turn is filtered when getting the bounce). So it doesn’t work for servers that “just” do spam filtering for incoming mails (like backup MXs or some UCE filters)…

]]> http://tom.knaupp.com/2008/03/05/should-i-use-dnsbl/comment-page-1/#comment-99 Steffen Sat, 17 May 2008 12:24:35 +0000 http://tom.knaupp.com/2008/03/05/should-i-use-dnsbl/#comment-99 Have you ever considered using Bounce Address Tag Validation (http://mipassoc.org/batv/)? I'm thinking about using BATV for senders listed in backscatterer.org. One problem that still remains is that BATV can only be applied to mails that can be clearly identified as bounces (i.e. have an empty envelope sender address). Backscatter from challange/response systems or out-of-office replies typically do not fall into this category. Have you ever considered using Bounce Address Tag Validation (http://mipassoc.org/batv/)? I’m thinking about using BATV for senders listed in backscatterer.org. One problem that still remains is that BATV can only be applied to mails that can be clearly identified as bounces (i.e. have an empty envelope sender address). Backscatter from challange/response systems or out-of-office replies typically do not fall into this category.

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