On Wed, Nov 10, 1999 at 01:12:02PM +0200, Nadav Har'El wrote:
> > ORBS will list any open SMTP relay that uses other methods to protect from
> > abuse (e.g. rate limiting).
>
> This is very true, and is the defence used by Netvision to explain their
> open relay. However it is still *my* prerogative to decide that I insist
> not to get mail from open relays, and therefor use ORBS. If you, Netvision,
> or anybody else feels there are hosts that are open relays but not spam
> risks, feel free to create a list ORTANSR (Open Relays That Are Not Spam
> Risks), or whatever, for that, and maybe I'll use that in my spam filter
> instead of ORBS.
It is a matter of definition of open. ORBS maintainers claim that rate limit
is not a defence against spam at all. However there were exactly zero
incidents of spam relayed through Netvision gateway[1] once the measure
was installed. Apparently other lists (RBL, etc) consider rate limiting
as adequate protection. Some of them require that you submit rate limiting
code for review.
In my opinion ORBS position on rate limiting is a complete idiocy. And
since there were less then 10 rejection from 150K+ outgoing email there
is/was no reason why Netvision should suck up to them.
[1] There was very small number of relay abuse before it. Netvision
used relay protection based on checking From: field. This arrangement
was discussed with and _approved_ by RBL maintainers on condition that
Netvision will improve it if amount of abuse increases.
P.S. I am _former_ Netvision sysadmin.
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