That's a really good question and I'm not certain I have an answer - would you care to share the domain and IP either here or off-list - I'll have a look around.
-----Original Message----- From: JB [mailto:[EMAIL PROTECTED] Sent: Monday, June 09, 2008 11:52 AM To: MS-Exchange Admin Issues Subject: Re: Reverse Lookup Issues Don- Thanks for the quick response. Since I'm not a DNS guru can you tell me how I would find out if my DNS is authoratative for that IP range? Thanks, _____________ John Bowles ----- Original Message ---- From: Don Andrews <[EMAIL PROTECTED]> To: MS-Exchange Admin Issues <exchangelist@lyris.sunbelt-software.com> Sent: Monday, June 9, 2008 2:47:54 PM Subject: RE: Reverse Lookup Issues I assume your DNS is authoritative for the IP range or address? (note, this is not the same as being authoritative for the domain). If not, I believe whoever "owns" the IP address will have to host the PTR record. -----Original Message----- From: JB [mailto:[EMAIL PROTECTED] Sent: Monday, June 09, 2008 11:40 AM To: MS-Exchange Admin Issues Subject: Reverse Lookup Issues All- We are having issues with reverse lookups on one of our client sites. Basically this is what I've discovered so far, that if you go to one tool on the internet to do a reverse lookup everything comes back fine. You go to another reverse lookup tool and it's unable to resolve. So i'm assuming that is where are reverse lookup issues are stemming from. I took a look on our external DNS and we do have a PTR record for the firewall that is the last hop out of our network to the internet for mail delivery. Any ideas? Thank you, _____________ John Bowles ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~ ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~ ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~ ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~
