Ptr record has to be added by the isp that gave you your ip address Some isps may give you a web interface for you to add your own ptr
-- srs (blackberry) -----Original Message----- From: "theju" <[email protected]> Date: Wed, 20 Jan 2010 13:10:10 To: <[email protected]> Subject: [TwinCLinG] Question regarding Reverse DNS while setting up a mail server Hi, Recently I set up a mail server (postfix with mail forwarding done by procmail) and the installation went fine without any hitch. I added SPF records for the domain and things seemed fine till there was a huge delay in the receiving of mails. While I checked the mail logs, I saw a warning from gmail mentioning that it had received lots of unsolicited email from our domain and hence were temporarily blocking us. There was around 30 emails an hour sent and all were legitimate. The server passed all relay block tests (not acting as an open relay) but somehow the error. So I googled around and found that the reverse dns lookup was failing [1]. I tried to read up stuff on how reverse DNS works and my brain started oozing out of the nose! After struggling for a long time, I managed to figure out that a PTR record is required for the reverse DNS lookup. I couldn't figure out how to add this through the domain registrar admin panel. I couldn't find it anywhere on the registrar admin panel. How do we add a PTR record for an IP without actually running a DNS server? In fact, I would be grateful if someone can explain or point me stuff on reverse DNS. [1] http://tools.bevhost.com/spf/ -- Cheers Theju ------------------------------------ ----------------------------------------------- Next Meeting as on our Website: http://ilughyd.org.in -----------------------------------------------Yahoo! Groups Links
