I became aware that just about all of 64.115.0.0/16, a network that I (among others) run, has been listed as "dynamic ip space" in sorbs as of April 2nd. On April 6th I sent my first email (via web-form) to sorbs telling them they were mistaken. Finding no documentation on how they deem networks "dynamic" or "static" I changed my rDNS scheme from ppp-64-115-x-x to 64-115-x-x Note to all: "ppp" in no way signifies dial-up; we run ppp over almost every circuit we have -- from dialup to OC12, to Ethernet and ATM. I also stated how all of our network was scanned twice a day for open-relay mail servers. Being a bigish ISP, we are _huge_ on our abuse policies, and our abuse bucket [usually] has only memories of tumbleweed blowing by. On april 10th I again wrote, only to be ignored further. Yesterday, April 13th, One of my customers opened a trouble ticket stating that he had successfully received a response from SORBS, and had forwarded me the conversation. I sent an email to duhl@sorbs.net (the author of the email) quoting what they had written one of my customers. They said to my customer that I had to either provide custom reverse DNS for each customer who was not dynamic, or I had to provide sorbs with POCs for all my non-dynamic customers. I stated how this was absurd, and that there was already a functioning medium for this task -- rwhois. In this same email, I also stated: 1. exactly which 64.115 networks were dynamic 2. that to prevent further hysteria, I had changed the reverse dns from ppp-64-115-x-x to static-64-115-x-x and dynamic-64-115-x-x, respectively. 3. their blindness was very unprofessional, deeming SORBS a Worthless Project ran by Ignorant Half-Wits As of this date I have not received a response from anyone at sorbs, and do not expect one. Our support crew is overwhelmed with upset customers who cant send email to their associates. Our only response to them is that we have tried to resolve the issue, but could not, and that the remote ISP should stop using sorbs. I am upset that they blindly blacklisted most of 64.115.0.0/16 because some of the reverse dns was generic. 64.115.47.0/25, for example, hasnt very much generic rDNS at all, but was blacklisted just the same. I hope all stop using SORBS. I especially hope Mr. Vixie reconsiders his helpfulness to such a harmful organization. For google: <a href="http://www.sorbs.net">A Worthless Project</a> Jeremy Kister www.jeremykister.com/jeremy/ Argus: The World's Most Advanced Monitoring Software: http://argus.tcp4me.com