Re: [mh] Spam filters

[Jason S. <ja...@sh...>]

Ditto on people that summarily block on dyn ip's.

I have had the same email address for a very long time and as a 
consequence I get 534 spam emails / day on average.  I started working on 
my own spam filter a long time ago and in the process of my research found 
an existing one that did what I wanted: http://www.tmda.net .

Used TMDA for about 4 years, no integration with your client email 
software needed (totally transparent), dont have a "junk mail" folder to 
check, and only have gotten only 4-6 spam emails in all that time 
(however they had legit emails so I can prosecute if I wanted)    In that 
time 2 or so people got confused about the challenge so they ended up 
calling me ( Tech recruiters are for the most part unintuitively tech 
stupid ;) )

-J




On Sat, 20 May 2006, David H. Lynch Jr. wrote:

> Troy Carpenter wrote:
> > On Thursday 18 May 2006 11:32, Joe Blecher wrote:
> >   
> >> Resending as first attempt was blocked by your spam filter
> >>     
> >
> > Actually, looking at your email headers, I see that it's a bit more 
> > complicated for you, and it gets into a touchy area with those of us running 
> > our own mail servers.
> >
> > For better or worse, I don't directly accept email where the connecting relay 
> > is a dynamic address (like dialup, cable modems, or in your case, DSL). 
>     There are numerous problems with this approach. Virtually all other
> DNSBL techniques as well as most spam filtering techniques require poor
> behavior before you get blocked.
>     Further, every other blocking mode provides a way out. In most
> instances just behaving will get you unblocked. Rarely agreeing to not
> misbehave is needed. But the Dialup/Cable/DSL block lists presume guilt,
> with no possibility of redemption. That is the first biggy.
> 
>     Relaying through somebody else unnecescarily delay's e-mail as well
> as complicating delivery. Not to mention it may be a violation of their
> terms of use.
> 
>     Numerous businesses with legitimate fixed IP service use another ISP
> to provide load balancing, failover. On servers I manage I deliberately
> configure outgoing SMTP and HTTP traffic to use a higher bandwidth lower
> cost backup cable .
> 
>     Further, the dialup/cable/dsl blocklists contain numerous errors.
> Atleast one server I manage is one a valid fixed IP. Yet it is in the
> block list. And many cable IP's are not.
> 
>     Finally there is no such thing as a dynamic IP. DHCP is a means of
> providing machines with IP's. Many easily publically accessible systems
> have their IP's assigned via DHCP. Many systems on the blocklist have
> their IP's assigned statically.
> 
>     Blocking e-mail using the dialup block lists is buying into the
> perception that their are different classes of servers on the internet.
> 
>     For many of us this is a very touchy subject. I support most of what
> MAPS does. I am totally in aggreement with blocking mailserver based on
> past bad behavior.
>     But the Dialup IP list goes against most of the principles the
> internet is based on.
> 
>     I would rather get a little more SPAM (and there are many other much
> more effective techniques of reducing it) that censure people based on
> their ISP.
> 
>     Huge amounts of SPAM have come via hotmail and aol. Should we just
> block, aol and hotmail ? It is not fundimentally different.
> 
> 
>     I do not have polite things to say about mail administrators that
> presume that my mail server or any I manage are going to misbehave.  To
> accomidate them I either have to configure my mail servers to relay
> their mail through my cable ISP, or I have to send their traffic out via
> the higher cost lower bandwidth DSL - increasing the load for my inbound
> clients.
> 
>     Regardless, I end up with alot of work to handle a small number of
> mail servers - and I end up having to do it manually.
>     I want to start my own DNS block list for mailservers that block
> "dialup ISP's".
> 
> 
>    
> 
> 
> -- 
> Dave Lynch 					  	    DLA Systems
> Software Development:  				         Embedded Linux
> 717.627.3770 	       dh...@dl... 	  http://www.dlasys.net
> fax: 1.253.369.9244 			           Cell: 1.717.587.7774
> Over 25 years' experience in platforms, languages, and technologies too numerous to list.
> 
> "Any intelligent fool can make things bigger and more complex... It takes a touch of genius - and a lot of courage to move in the opposite direction."
> Albert Einstein
> 
>