BT3Central's reverse DNS

[jbalders]

Sam,

After implementing some anti-spam features in my mail server, I noted that BT3Central's reverse DNS isn't set up. To wit:

jb2@loki keep $ nslookup mail.bt3central.com

Non-authoritative answer:
Name: mail.bt3central.com
Address: 198.247.173.131

jb2@loki keep $ nslookup 198.247.173.131

** server can't find 131.173.247.198.in-addr.arpa: NXDOMAIN

I also noticed that mail sent from BT3Central comes from 198.247.173.242, which doesn't have it's reverse DNS set up either:

jb2@loki keep $ nslookup 198.247.173.242

** server can't find 242.173.247.198.in-addr.arpa: NXDOMAIN

I believe the relevant RFC's state that all mail servers are supposed to be resolvable in both directions. It doesn't necessarily have to resolve to a BT3Central address, but it's supposed to resolve to something.

I just thought you might like to know.

Jeff

[Sam Conder]

Not complaining, but next time just send me an e-mail regarding issues of this nature rather than making a forum post. No sense throwing off the "signal to noise ratio" of the forum.

Thanks,

[Sam Conder]

Fixed:

quote:Asking ns1.nevidia.com. for 131.173.247.198.in-addr.arpa PTR record: Reports mail.bt3central.com.

Answer:
198.247.173.131 PTR record: mail.bt3central.com. [TTL 3600s] [A=198.247.173.131]