ISPs blocking SMTP connections from dynamic IP address space
doug at polands.org
Thu Aug 7 07:01:54 PDT 2003
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
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"?
More information about the freebsd-questions