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Originally Posted by scastle
I believe that NTL's anti spam system is currently still "learning" how to identify spam (basically, it's in a mode where it analyses mail to look for possible spam identifiers - known IPs spam is sent from, bulk mailing etc), so, at the moment, is not identifying as much spam as it will do.
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The first part of the above is completey wrong, the second part is kind of right.If you look at this
http://www.cableforum.co.uk/article/158/ntl-deploys-advanced-openwave-spam-and-virus-protection you will see reference to Gxedge , this is a Spam blocking system not spam filtering.
Spam blocking works from blocklists like spamhouse and does not allow the identified spam mail onto the mail platform in the first place, so it cannot be analyzed.Block lists are lists of known bad i.p.s domaints etc
The second NTL phase of using Britemail is the spam filtering which works on mail that has got onto the platform and it is that that will look at content spam signatures etc