From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: To: 9fans@cse.psu.edu Subject: Re: [9fans] stubbing From: Charles Forsyth Date: Fri, 7 Oct 2005 16:04:23 +0100 In-Reply-To: <434689BF.7080700@anvil.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Topicbox-Message-UUID: 96230450-ead0-11e9-9d60-3106f5b1d025 the quality of the blacklists is poor and many entries are completely unrelated to spam, based on a silly assumption; and it's usually impossible to correct incorrect data (because the rbl maintainers are morons, sorry: officious morons). (all right, to be fair, perhaps most are wonderful and of course i only notice the ones that cause me grief.) the problem with reverse lookups is that because so many IP addresses are assigned from bigger blocks, although it's easy to provide A records, MX, the TXT used for SPF, TXT used for keys, etc., it's often impossible to provide PTR because the DNS for that isn't under the same admin as the DNS for names (thanks to DNS design) and it's often hard even to find the person who could put PTR records in, or delegate them (and often they don't provide that service).