3rd part challenge response (Full Version)

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Guest -> 3rd part challenge response (5.Apr.2004 5:01:00 PM)

Are there any third party add-ons that do challenge response for spam avoidance? I know of some that work on the client side but I would like a server side solution.

Guest -> RE: 3rd part challenge response (6.Apr.2004 11:38:00 AM)

One good product that can be installed on Exchange 2000/2003 for spam blocking is MailEssentials by GFI (www.gfi.com). its Bayesian analysis filter works quite well and the rate of success in spam blocking is high while the false positives is very low.

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