[48862] in North American Network Operators' Group
Re: ATTBI refuses to do reverse DNS?
daemon@ATHENA.MIT.EDU (Jared Mauch)
Tue Jun 18 20:44:21 2002
Date: Tue, 18 Jun 2002 20:40:21 -0400
From: Jared Mauch <jared@puck.Nether.net>
To: Stephen Sprunk <ssprunk@cisco.com>
Cc: Daniel Senie <dts@senie.com>,
Stephen Griffin <stephen.griffin@rcn.com>, nanog@merit.edu
In-Reply-To: <06a101c21714$5d205520$9d876540@amer.cisco.com>
Errors-To: owner-nanog-outgoing@merit.edu
On Tue, Jun 18, 2002 at 04:54:54PM -0500, Stephen Sprunk wrote:
>
> Thus spake "Stephen Griffin" <stephen.griffin@rcn.com>
> > The lack of clue tends to be on the providing in-addr side of
> > things. I think it is a great thing to refuse connections from
> > ips without in-addr, in the same way it is great to refuse mail
> > from domains that don't provide postmaster addresses.
>
> On first reading, I thought that was sarcasm. Now I realize you're serious.
I've found that filtering out mail from
people that have no reverse dns tends to typically point to
a) open-relays, b) spam, c) lack of working abuse/postmaster.
> > It is a means through which one can influence the laziness of
> > others. Simply disregarding what others do, only legitimizes
> > the laziness, and continues us along the road of everyone
> > doing the absolute minimum.
> > ...
> > You neglect to include the option of the customer changing
> > to an ISP that provides in-addr.
>
> So, if you ran Amazon.com, you wouldn't accept money from customers of clueless
> ISPs?
You can't do it on the store side, but you can do it on the
residental customer side, or at least give those messages a higher
level of attention in any overall spam score for a message.
> Sadly, even that level of coercion wouldn't be anywhere near enough to motivate
> most ISPs. And your (non-)customers will be caught in the crossfire.
Anyone that sends e-mail to me from a host/server with no reverse
dns I will not see. It is not rejected w/ 400/500 series code
as I know some people do. it goes to it's own 'spam' folder.
I have found that some companies (american express) for
example can not seem to make their systems have reverse dns, and
they suffer from the lack of a working postmaster/hostmaster
address too.
It just means i read that folder once every few days and
periodically send e-mail to people i know that have hit the filter
or other legit folks.
- jared
--
Jared Mauch | pgp key available via finger from jared@puck.nether.net
clue++; | http://puck.nether.net/~jared/ My statements are only mine.
