Re: [exim] Port Tests to Verify the Sending Hosts

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Author: Marc Perkel
Date:  
To: Ian Eiloart
CC: exim, Matt Fretwell
Subject: Re: [exim] Port Tests to Verify the Sending Hosts
Whoops - sorry about that.

Ian Eiloart wrote:

> Hold on a minute Marc.
>
> You've quoted my contributions, and attributed them to Matt. That's
> quite inappropriate. You've also quoted them out of context, and
> placed them in a new context where it looks like you maybe thing I'm
> insulting you. Perhaps you think I am, but I was intending to defend
> your point of view.
>
> --On March 7, 2005 06:36:04 -0800 Marc Perkel <marc@???> wrote:
>
>>
>>
>> Before everyone continues to get frealy and insulting, please actually
>> think before you respond. Some idea are a little raw and I throw them
>> out
>> to inspire creative thinking to come up with useful ideas. It's about
>> innovation.
>>
>> Having said that - any information that produces a statistical
>> difference
>> between spam and ham is work looking at.
>>
>> We are already doing sender callback tests agains the senders email
>> address. So the idea of doing a little active testing against the
>> sending
>> host is hardly a radical idea.
>>
>> I don't think anyone would disagree that a host that has port 465
>> open is
>> more likely not to be a spammer.
>>
>> We are also running blacklist tests against the host IP and I am doing
>> DNS lookups for the nameservers of the class C range of the revers
>> DNS to
>> get a fingerprint about who is hosting the potential spammer.
>>
>> So - the more general question is - are there tests that we can do on
>> the
>> connecting host that would provide useful information to determin if
>> they
>> are a spammer or not a spammer. In this case I don't so much see an
>> opportunity to identify spam as I do to identify ham. So - responses
>> like
>> "you'll be blocking me if you do that" are not relevant to this idea.
>>
>>
>>>
>>>
>>> --On March 6, 2005 16:29:39 +0000 Matt Fretwell <mattf@???>
>>> wrote:
>>>
>>>
>>> That's ridiculous. Why would an SMTP server that's trying to send me
>>> mail object that I try to make a TCP connection to it. I already do
>>> ident callouts to the sending host. Surely its completely fair to make
>>> a callout to a sending host as frequently as it tries to send mail
>>> to me.
>>>
>>> It looks to me like the list is playing the game of trying to find the
>>> most spurious objections to Marc's proposals that it can - again.
>>>
>>>
>>> As are most of the methods that we use to prevent spam. Its an arms
>>> race.
>>>
>>
>> --
>> Marc Perkel - marc@???
>>
>> Spam Filter: http://www.junkemailfilter.com
>>     My Blog: http://marc.perkel.com
>> My Religion: http://www.churchofreality.org
>> ~ "If it's real - we believe in it!" ~

>
>
>
>


--
Marc Perkel - marc@???

Spam Filter: http://www.junkemailfilter.com
    My Blog: http://marc.perkel.com
My Religion: http://www.churchofreality.org
~ "If it's real - we believe in it!" ~