22 Jul
2004
22 Jul
'04
12:29 p.m.
Hi again,
On Thu, 22 Jul 2004, Thierry Coutelier wrote:
| Btw, some providers force a redirect of SMTP traffic
to their
| own mailserver. Have a look at:
|
| http://www.init7.ch/anti-spam/index.php
|
| No idea how they handle smtp-auth to other servers...
I don't like the idea. Only introduces problem for stand-alone mail
servers as ours.
Interestingly, I just hit upon a paragraph in the SPF FAQ [1]:
[1] http://spf.pobox.com/faq.html
Q: What about the cracked, open-proxy DSL machines that are spam sources
today?
Spammers are increasingly using compromised machines on fast connections
to send spam.
A: Broadband providers will have to either force port 25 to go through
their servers where they can keep an eye on traffic, or suffer the
reputation costs of having their "forged" domain name in the envelope
sender line. I know people who block Hotmail, Yahoo, and AOL simply
because those are the most commonly forged domains; that hurts their
legitimate users and ultimately it hurts them.
So it looks like the SPF guys do approve of such measures...
I just don't see (yet) how those broadband clients could then
be able to do SASL AUTH to other mailservers.
Greets Eric