Date: Sat, 05 Aug 2006 07:13:46 -0700 From: Chris Maness <chris@chrismaness.com> To: Matthew Seaman <m.seaman@infracaninophile.co.uk> Cc: freebsd-questions@freebsd.org Subject: Re: DNS Blacklist Script? Message-ID: <44D4A79A.5080302@chrismaness.com> In-Reply-To: <44D47850.5020705@infracaninophile.co.uk> References: <44D3ACE0.7050202@chrismaness.com> <44D47850.5020705@infracaninophile.co.uk>
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Matthew Seaman wrote: > You need to be very careful implementing something like this. Most > Spam nowadays is bot-generated and uses forged 'From' addresses culled > from the address books on infected machines. Unless you're careful, > you're going to end up blocking a lot of completely innocent people, > or worse, blocking your own legitimate e-mail users. > > DNS based blacklists are based on the senders IP address, not the forged from address.
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