On Tue, Jul 09, 2002 at 04:11:53PM -0400, Graham Van Epps wrote: > We've been using procmail and the sendmail DNSBL feature to check > incoming mail for spam, but we still get a *lot* of it. I wonder what > other people are using to fight spam coming into their networks. Whats > the most popular? Are there *any* good opensrc or commercial tools to > do this? It seems like most of the tools out there arent very good. > Any ideas?
I have some information about what I do at http://www.kluge.net/mailfiltering/ Basically, I use a bunch of open-relay RBLs and a few custom sendmail rules to block obvious spam at the SMTP level. Then during delivery, users can run SpamAssassin (http://www.spamassassin.org -- an absolutely terrific open source spam scanner) to determine if a message is spam or not. Procmail then handles what they want to do with the spam from there. Another good tool (works with SpamAssassin too) is Razor (http://razor.sf.net/). It works by checking incoming messages against a centralized database of reported spams. There's also DCC (Distributed Checksum Clearinghouse, also works with SpamAssassin, http://www.rhyolite.com/anti-spam/dcc/). I haven't tried it, but it's similar to Razor but checks for "bulkiness" of a message, as opposed to determining if a specific message was reported as spam or not. -- Theo Van Dinter, [EMAIL PROTECTED][EMAIL PROTECTED] Consultant, Collective Technologies (www.collectivetech.com) Systems Administrator, bblisa.org/kluge.net
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