Goto www.declude.com/tools. There you'll find a reverse DNS tester. You should also consider running the DNS Report to get a more complete diagnosis of the health of your DNS entries.
Todd -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Alan Walters Sent: Wednesday, January 23, 2002 8:20 PM To: [EMAIL PROTECTED] Subject: [IMail Forum] How to confirm Reverse DNS is working? I'm hoping that somebody can help me confirm that my ISP's have setup Reverse DNS for our Mail Server correctly. Using the neat tool at http://www.dnsreport.com/tools/dnsreport.ch?domain=roycemedical.com I was able to determine that we didn't have a Reverse DNS entry, which explained why some of our email was being rejected by other servers. I contacted AT&T, who is the owner of our Managed Internet Service IP Address Block. They responded that since we already had DNS setup by a local company (Over The Net, who have been hosting our Website prior to us getting AT&T), that OTN should create the PTR Record. OTN claimed they couldn't legally create a PTR Record which pointed back to an AT&T Address Block that OTN didn't own. AT&T finally agreed to delegate Authority for our Address Block to OTN's Name Servers, allowing OTN to create a PTR. Now when I use http://www.dnsreport.com/tools/dnsreport.ch?domain=roycemedical.com I get neither a PASS nor a FAIL on the Reverse DNS section. It seems like the test just times out waiting for a response. If I try using http://www.dnsstuff.com/tools/ptr.ch?ip=12.35.200.18 it responds with: >How I am searching: >Searching for PTR record for 18.200.35.12.in-addr.arpa at d.root-servers.net: Got referral to CMTU.MT.NS.ELS-GMS.ATT.NET. >Searching for PTR record for 18.200.35.12.in-addr.arpa at CMTU.MT.NS.ELS-GMS.ATT.NET.: Reports 18.200.35.12.in-addr.arpa. > >Answer: >12.35.200.18 PTR record: 18.200.35.12.in-addr.arpa. [TTL = 83000 seconds] > >Details: >You have one or more obviously bogus PTR records (pointing to in-addr.arpa). What does it mean by 'bogus' PTR? I also found this 'dig' Website: http://us.mirror.menandmice.com/cgi-bin/DoDig?host=ns1.otn.com&domain=roycem edical.com&type=PTR But I don't know how to interpret the results? Alan Walters Director of I.T. Royce Medical [Virus and worry-free with Declude] Please visit http://www.ipswitch.com/support/mailing-lists.html to be removed from this list. An Archive of this list is available at: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Please visit http://www.ipswitch.com/support/mailing-lists.html to be removed from this list. An Archive of this list is available at: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/
