> From: Mark Smith <ietf@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> > > people to monitor and deal with their abusive customers. That > > is why many of the providers of those $30/month accounts submit > > their own IP address blocks to various "dynamic" backlists or > > block port 25 themselves. > > Do you have more information or references regarding your > statements above? I'm interested in any studies etc. The easiest study is to look at your own spam load. The most recent public study or reliable comment I'm aware of was the statement from Comcast about how much spam they send in http://news.com.com/Attack+of+Comcast%27s+Internet+zombies/2010-1034_3-5218178.html See also http://www.senderbase.org/?searchString=comcast.net&searchBy=domain and http://www.senderbase.org/ (I do not believe SenderBase's numbers are accurate to better than several percent of total Internet mail or tens of millions of msgs/day. I know that their numbers for the domain names and IP addresses I control are nonsense, but my domains and addresses are directly involved with 5 or 6 orders of magnitude less mail than those listed in http://www.senderbase.org/ ) > I would find TCP port 25 being blocked by my ISP to be > unacceptable. It isn't the Internet anymore. The Internet's job > is to shunt around IP packets, irrespective of what is in them. That is inaccurate. From ancient days it has also been the job of people running things to prevent traffic that would violate various agreements, AUPs, TOS, and so forth. > My anti-spam measures are so effective that I can't remember the > last spam I received. Yes, spam filtering can be quite effective. I say this based in part on the results of the DCC, which handled about 136,000,000 mail messages on May 26. However, the effectiveness of input filtering is irrelevant to the need to deal with spam at its sources. > I would find not be able to run my own MTA, > unfortunately on a dynamically assigned IP ADSL service, as that > is all I can afford, to be far more costly than the very > negligable reduction in spam I would receive if TCP port 25 was > blocked by ISPs. I cannot understand that as other than a demand that I subsidize your Internet service. If you think that everyone has the right to run their own MTAs, why don't you insist that Full Internet Connectivity be free? Vernon Schryver vjs@xxxxxxxxxxxx _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf