ISPs blocking SMTP connections from dynamic IP address space

Lucas Holt luke at
Thu Aug 7 07:17:02 PDT 2003

Why don't people talk about software developers?  Someone is writing 
the software for spammers.  Lets go after them.  Think about it;  
spammers have an average education level of high school dropout.  
Mainstream media has done stories about this.

Bottom line, spammers are too stupid to write spamming programs.

Blocking legitimate administrators of domains because they are too poor 
to go with Verio is crap.    Everyone was small once.  By your policy, 
ISPs couldn't start.  My former employer,, started on an 128k 
ISDN line in 1996.  Using DSL now is no different than that.  You 
bigger guys just want money from us.

Any business that wants to run windows servers for example must pay 
double for renting a server or they can pay full colo prices plus buy 
the windows licensing.  Even using freebsd is cheaper on DSL.

For example, I pay 100 bucks a month to rent a FreeBSD server with a 
1.2 gig celeron, 256 mb ram, and a 20 gig hdd.  I get 100 gig of 
transfer a month.  (my server is in California)To colo a server in 
Michigan costs 150 dollars on average for a 128 k package.  A dedicated 
DSL package with 384 downstream, 128k upstream with 5 static ips from 
SBC costs around 70 dollars a month.  Thats why people use DSL to hosts 
sites.  Its slow, but cost effective for small businesses.

On Thursday, August 7, 2003, at 10:00  AM, Doug Poland wrote:

> On Thu, Aug 07, 2003 at 03:27:15PM +0200, Roger 'Rocky' Vetterberg 
> wrote:
>> Doug Poland wrote:
>>> Within the last two months both AOL and Time Warner Road Runner
>>> have implemented port 25 blocks from hosts with IP addresses in the
>>> "dynamic address space".  Time Warner claims other major ISPs
>>> are/will be implementing the same policy.
>>> A little help here?
>> Sorry, but I cant help you here, I fully agree with AOL and the big
>> guys.  We have to take some serious action against spam,
> I hate spam as much as the next guy.  But
>> piss a lot of people off, but as they say: you cant make an omelett
>> without breaking some eggs.  I say block the dynamic address space,
> This is where I disagree.  What is the "dynamic address space" anyway?
> DSL, dial-up, and cable modem providers IP ranges?  This separates the
> world into the "haves" and "havenots" based on static($$$) vs.
> dynamic IP range.  So the big ISPs get to say,
> 	"We will not accept a connection from a host, on port 25,
> 	unless the IP originates from an IP range we have decided is
> 	acceptable."
> What happens when the ISPs decide,
> 	"We will not accept a connection from a host unless the MTA is on
> 	the approved list, i.e., Microsoft Exchange"
>> block everything that lacks proper reverse dns
> I have proper reverse DNS.  I don't get to connect because of this
> "dynamic IP range" issue.  If one has proper reverse dns, should one
> be blocked because the host IP comes from a "dynamic address space"?
> Why?
> -- 
> Regards,
> Doug
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Lucas Holt
Luke at
________________________________________________________  (Jewel Fan Site) (Free blogging)

"Only two things are infinite, the universe and human stupidity, and 
I'm not sure about the former."
- Albert Einstein (1879-1955)

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