Dan Barker schrieb: > > I'm receiving a lot of 421 rejects with: > > > > Unexpected connection response from server: > > 421 mails from 74.254.46.133 refused: local dynamic IP address > > 74.254.46.133" > > > > Does anybody recognize the text of the message? I'd like to confirm > > that there are no popular DUL lists showing 74.254.46.133 as dynamic, > > but the 421 message says very little. DNSReport says it's clean. I've > > tried to contact some postmaster accounts (using Yahoo.com, since I > > can't use my own mailer) but they appear to be RFC ignorant too. > > Unfortunately, it's not just one ISP in Germany and I'd like to > > understand if there's anything I can do on my side. > > > > The only thing that comes to mind is that my rDNS is delegated to my > > own name server. Maybe there's some sort of DNS software out in the > > wild that doesn't support delegation? I'm really at a loss. > > > > Dan > >
arni writes: > 133.46.254.74.in-addr.arpa is an alias for 133.128.46.254.74.in-addr.arpa. > 133.128.46.254.74.in-addr.arpa domain name pointer mail.visioncomm.net. > > probably a not so clever blacklist considering your ip dynamic because the alias has its own ip in the alias name > > arni > Dan Barker follows up: I "think" you confirmed that my delegated rDNS is proper and that the 421 message is in error. But I'm not certain. Can you please confirm your assessment? My ISP provides me a /26 subnet out of the 74.254.46.0 class C, so the rDNS delegation is done with CNAMEs from the class C subnet to my 74.254.46.128/26 subnet's DNS servers. They serve the appropriate PTR records. Thanks again for the bandwidth; Dan
