On Mon, Feb 02, 2004 at 09:29:28AM +0100, Gustav Foseid asserted:
Meng Weng Wong <mengwong(_at_)dumbo(_dot_)pobox(_dot_)com> writes:
1) ISPs are expected to be the point of control for outbound mail.
Getting users to secure their machines is a lost cause. ISP SMTP
servers have to be responsible for performing virus and spam
filtering.
Many ISPs disagree with this. They see themself as a transparent
carrier, much like a postal service.
As an ISP, I like to think that I am just a common carrier in order to gain the
protection afforded an OCC. But in practical application, I have to filter
malicious traffic. Spam costs me money in increased bandwidth requirements as
well as increased staffing to handle the bitching from both our clients and
other ISP's. I filter ports and I also scan outbound mail for problems that
would identify compromised machines. I also have a firewall between our router
and the internal network doing stateful packet inspection to control rogue
traffic. No matter how I look at the situation, I have to impliment these or
face increased costs and with ISP margins as small as they are, I don't want to
have to afford extra staff of bandwidth in order to project the 'hands-off'
personality.
If a client wants to co-locate and connect directly to their own box, that's
fine and I will not filter their traffic by port or content. I will cap their
bandwidth though. If that client causes a ruckus deliberately or through poor
administration, we get draconian and pull their plug until they fix the
problem. Of course, the co-located clients are welcome to use our mail servers
as a gateway and take advantage of things like AV scanning and statistical
reporting that they probably won't want to pay for on their own.
I'm tired now and I may be rambling a bit...
--
Bob Greene
Public key available at
http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xC9C7841C
Or, you can just pull my finger
-------
Sender Permitted From: http://spf.pobox.com/
Archives at http://archives.listbox.com/spf-discuss/current/
Latest draft at http://spf.pobox.com/draft-mengwong-spf-02.9.5.txt
Wiki: http://spfwiki.infinitepenguins.net/pmwiki.php/SenderPermittedFrom/
To unsubscribe, change your address, or temporarily deactivate your
subscription,
please go to
http://v2.listbox.com/member/?listname(_at_)©#«Mo\¯HÝÜîU;±¤Ö¤Íµø?¡