Hi Folks, I checked this myself, recursing from the a.root-servers.net machine, and indeed, the authoratative name servers for the 209.249.29. netblock are not responding with a forward dns entry for 209.249.29.67 I realize that this is a bit of a quandry since sources.redhat.com responds for multiple domains, but surely the reverse dns should resolve to _something_, right? Let me know if I need to take further action on this. Kind regards, Matthew Galgoci ----- Forwarded message from Mark Klein via RT ----- Envelope-to: rao@gnu.org Delivery-date: Sat, 04 Jan 2003 21:43:12 -0500 Subject: [gnu.org #15993] Reverse DNS on gcc.gnu.org From: "Mark Klein via RT" Reply-To: sysadmin@gnu.org X-RT-Loop-Prevention: gnu.org RT-Ticket: gnu.org #15993 Managed-by: RT 2.0.14 (http://bestpractical.com/rt/) RT-Originator: mklein@dis.com Bcc: To Whom it May Concern: Sometime around the second or third week of December, reverse lookups on gcc.gnu.org started failing and continues to this point: dig -x 209.249.29.67 ; <<>> DiG 9.2.1 <<>> -x 209.249.29.67 ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 42271 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;67.29.249.209.in-addr.arpa. IN PTR ;; Query time: 107 msec ;; SERVER: 64.7.69.254#53(64.7.69.254) ;; WHEN: Sat Jan 4 18:35:33 2003 ;; MSG SIZE rcvd: 44 As part of our spam blocking strategy, we have sendmail configured to reject mail from sites where reverse DNS does not provide a valid address. As a result, our email subscriptions to some of the gnu lists did not get through until we temporarily disabled this. Do you plan to make this a permanent "feature" or was it just an oversite? Our needing to disable that checking in sendmail has meant that our spam receipts have tripled. Regards, M. -- Mark Klein http://www.dis.com PGP Key Available -- Matthew Galgoci "Dirty deeds, done dirt cheap" System Administrator Red Hat, Inc 919.754.3700 x44155