[NTLUG:Discuss] Spam question

[Bug Hunter]

  Well, you asked.  :) (see my sig)

  There are various RBL (Real Time Block Lists (or Real Time Blacklist) 
out there.  By using a combination of RBL and filters, you can get your 
spam from 60 a day (in my case) to about 1 a day in your main mailbox.


  I started an RBL (with some others)  and have had it 
running for over a year. To get an idea of how effective an RBL can be, go 
to http://graphs.maildeflector.org 

  I think you'll be surprised when you see the graphs.  over 8 million 
email delivery rejects (for spam reasons) for about 11 million email 
delivery attempts.  Spam is now  running at 77% of all email delivery 
attempts for the people I'm getting statistics from.

  The database is populated by emails sent to spam bait addresses.  Out of 
about 45,000 entries, over 13,000 of those entries are matched against 
delivery attempts every month.  That is a good indicator of how the 
system is working.  (with 1/3 of the database actively being used) Other 
RBL lists may be willing to give you that information also.

  The whole system runs under Linux (OF COURSE!).  I took the 
standard named and  added a database query system to it, and run it 
against MySQL.  Our system load  is rather light, even so.  We are running 
about 5-10 queries a second right now, and everything holds in there 
rather well, on only 500mhz machines!

thanks,
bug

On 21 Jan 2003, Wayne Dahl wrote:

> Ok guys, here's a good question for the group.  I'm sure you've all
> gotten spam that you've written filters for, but it seems the latest
> batch of junk is written specifically to bypass filters.  For example,
> if you write a filter to delete messages containing the word fizgig,
> inevitably, someone wanting to bypass your filters will write the email
> in html with something like this crap in it....fiz<-!---12354->gig and
> the filter merrily passes it by.
> 
> So...what have you guys done to kill this garbage when there is nothing
> else in the email to key on?
> 
> Wayne
> 
-- 
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