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Jon M · 07-01-2004, 08:01

There seem to be some mis-conceptions about how a server side anti-spam solution may work..

The blacklist, is a list of either domains or IP addresses that are KNOWN to be originators of spam, as in they've had a certain number of complaints and had them followed up.
A blacklist should never block an entire domain if there are legitimate accounts operating from it.
Nor should open relays be blocked, because an appropriate spam reporting system should highlight a problem like that and enable the relavant admins to rectify problems with their setup.

A well established and maintained blacklist would not filter out the legitimate emails described in previous posts.

What we need to get out of our heads is the notion that an ISP would operate some kind of active filter based on rules.. that would be a total waste of their time.. and more to the point it would use up much more processing time, which again.. no sensible ISP would want.

07-01-2004, 08:01	#20
Jon M Inactive Join Date: Oct 2003 Location: East Midlands Age: 48 Services: Rural BB - Radio Link via Virgin Fibre Posts: 2,947	Re: How should NTL handle spam ? There seem to be some mis-conceptions about how a server side anti-spam solution may work.. The blacklist, is a list of either domains or IP addresses that are KNOWN to be originators of spam, as in they've had a certain number of complaints and had them followed up. A blacklist should never block an entire domain if there are legitimate accounts operating from it. Nor should open relays be blocked, because an appropriate spam reporting system should highlight a problem like that and enable the relavant admins to rectify problems with their setup. A well established and maintained blacklist would not filter out the legitimate emails described in previous posts. What we need to get out of our heads is the notion that an ISP would operate some kind of active filter based on rules.. that would be a total waste of their time.. and more to the point it would use up much more processing time, which again.. no sensible ISP would want.