Hello Pete,

Are you going to implement something similar for false positives?

Thanks,
Daniel 

> -----Original Message-----
> From: [EMAIL PROTECTED] 
> [mailto:[EMAIL PROTECTED] On Behalf Of Pete McNeil
> Sent: Friday, October 14, 2005 12:32 AM
> To: William Van Hefner
> Subject: Re[2]: [sniffer] POP Approach
> 
> On Wednesday, October 12, 2005, 6:30:45 PM, William wrote:
> 
> WVH> Pete,
> 
> WVH> Was just wondering, I have all of my e-mail pass through 
> an IMGate/Postfix
> WVH> machine prior to hitting my main mail server. Sometimes, 
> e-mail (especially
> WVH> spam) gets forwarded from the secondary MX as well. If 
> we use the POP method
> WVH> of redirecting spam to an appropriate mailbox are you 
> just going to be
> WVH> scanning the messages for content, or inspecting the 
> headers for IP
> WVH> information as well?
> 
> We will inspect all parts of the messages manually and with automated
> tools. This is true of all spam that arrives at our system no matter
> how it gets there.
> 
> WVH> Reason I'm asking is, I just want to make sure that one 
> of my own servers
> WVH> doesn't end up included in some type of blacklist rule. 
> It seems like it
> WVH> would take an awful lot of work on your part to ensure 
> that any filters
> WVH> don't contain IPs of one of your customer's machines, if 
> you are scanning
> WVH> header information. When you throw-in the fact that the 
> redirect may come
> WVH> from the client of an entirely different network with no 
> link whatsoever to
> WVH> our DNS records, that would seem to make taking any 
> header information
> WVH> (except maybe the Subject or From lines) into account a 
> very risky
> WVH> proposition. Thanks!!!
> 
> Actually, we can often be very precise about the routing of messages
> pulled from pop accounts.
> 
> That said, there is always a non-zero risk that an IP which is listed
> in certain black lists and also arrives at one of our traps may be
> added to our rulebase. This is almost always an automated process
> since we have determined that manually entered IPs are prone to
> errors.
> 
> If an IP on one of your servers does get tagged, then you would be
> able to use to rule-panic procedure for immediate relief and once the
> problem was solved it could not be recreated.
> 
> Part of our system is that it remembers every mistake we ever made and
> prevents us making that same mistake again --- unless we're really,
> really determined ;-)
> 
> Understand, I'm not making light of this possibility... we take all
> false positive cases (real or imagined) very seriously. I do want to
> point out that these cases are rare, easily solved, and nearly
> impossible to repeat. I should also point out that this "risk" is not
> increased by using the pop3 method.
> 
> Hope this helps,
> 
> _M
> 
> 
> 
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