Re: Last Call: 'Email Submission Between Independent Networks' to BCP - Clarification

[Doug Royer <Doug at Royer.com>]

I have not been following this topic closely.
To the point of open relays being a problem.

I think that the judgment as to if open replays are a problem
or not depends on which spam lists you are on.

With my system and by grep-ing through my last 4 weeks of logs
there were 22,870 of 26,157 spams blocked by my usage of two open
relay DNS-black lists blocking them from 14,131 UNIQUE IP addresses.
6,676 of which have no reverse-DNS. They seem to be in IP blocks of 
10-12. The other 2,616 spams that were DNS-blocked were from
non-open-relay lists. I still get 20-50 spams that make it to
my inbox every day.

The SORBS pages say they have over 3 Million such open relay
or open proxy (hacked or not) sites.

Spammers seem to setup open relays and use them. And as I do not
think that there are 14 thousand spammers, my guess is that the
spammer machines change their IP nightly or find a lot of open
relays. If it were not for open-relay DNS black lists,
I could not run my company.

About 90% of the the spam that is in my logs seems to be from
open relays.

I read your paper. And FYI,  I can name ONE person that is responsible
for about 60% of the spam that makes it into my inbox. So it is possible
that a few spammers are reading the anti-spam lists.

I can not me certain that the open-relay DNS-black lists are not
blocking other traffic. I only know which lists I subscribed to
after trial and error and looking at the logs to see which stopped
more spam.

> 3) Assertions and assumtions in the draft are based on spamops "lore"  
> rather than fact. This is bad engineering. The "issue" in the draft is
> whether its assumptions and assertions about open relays and email
> authentication are based on facts, versus the opinions of zealots.  
> Neither open relays nor email authentication has been shown to be related
> to spam: Neither promoting spam, nor preventing spam.

--

Doug Royer                     | http://INET-Consulting.com
-------------------------------|-----------------------------

              We Do Standards - You Need Standards

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