Upgrade to Exchange 2003 and enable recipient filtering and tarpitting. > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:bounce- > [EMAIL PROTECTED] On Behalf Of Bob Morris > Posted At: Monday, June 05, 2006 3:30 AM > Posted To: swynk > Conversation: Directory Harvesting > Subject: Directory Harvesting > > I work in a country where Internet bandwidth is very expensive. Our > company is plagued with directory harvesting spam which occupies a very > considerable proportion of that bandwidth. By directory harvesting spam > I mean large numbers of messages sent to <random-fictitious- > user>@<real_domain>. > > It would seem to me that it would be possible to install some kind of > Active Directory aware filter at the ISP end of our link which would > simply drop such messages down a hole and forward only those with > genuine mailbox adresses. We have internal anti-spam software which can > handle the "genuine spam" adequately. > > Looking through the literature it would seem that maybe using C# code > to hook into the MS SMTP categorizer sink would do the trick but it > seems to me that someone must have tackled this problem already. Also > in view of the known proclivities of the ISP a Unix family solution > would be useful. > > Any suggesions will be most welcome. > > Bob > > _________________________________________________________________ > List posting FAQ: http://www.swinc.com/resource/exch_faq.htm > Web Interface: http://intm-dl.sparklist.com/read/?forum=exchange > To subscribe: http://e-newsletters.internet.com/discussionlists.html/ > To unsubscribe send a blank email to [EMAIL PROTECTED] > dl.sparklist.com > Exchange List admin: [EMAIL PROTECTED] > To unsubscribe via postal mail, please contact us at: > Jupitermedia Corp. > Attn: Discussion List Management > 475 Park Avenue South > New York, NY 10016 > > Please include the email address which you have been contacted with.
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