[Mimedefang] Mail exchangers at roaringpenguin.com

[Stephen L Johnson]

On Wed, 2003-11-19 at 18:51, David F. Skoll wrote:
> Our hosting provider informed us that we had to change our IP addresses,
> so we're now coming from 209.195.84.23 rather than 216.191.236.23
> 
> I don't know why easynet.nl is blacklisting us; they shouldn't be. This
> is typical collateral damage from DNS-RBL's when an IP address changes. :-(

It could be that the IP range had been bit active for a while. So
unscurpulous site had "stolen" the IP block for a period of time, do
nasty stuff and then disappear.  Some of all of the IP are blacklisted.
When the IP block is used again for real, they find some or all of the
IP blacklisted.

There have been a couple of threads on the NANOG list talking about it.

-- 
Stephen L Johnson                       stephen.johnson at mail.state.ar.us
Unix Systems Administrator              sjohnson at monsters.org
Department of Information Systems
State of Arkansas
501-682-4339