Reverse DNS

Hi,
If I lookup mail.mydomain.com it point to our correct static IP address but if I do a rDNS lookup on the IP it point to my broadband service providers server not mail.mydomain.com. How do I fix this as I think it is causing our sent email delivery problems?

Thanks
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QuarmAsked:
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James NewportCommented:
You need to put in a request to your ISP to set up your rDNS as it is controlled by them. Sometimes it is available in the CP for your ISP, ISP's in the uk like ZEN offer control - companies in UK like BT you have to raise a ticket.

If you can't get rDNS setup you could use a smarthost if you are using exchange.

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QuarmAuthor Commented:
We currently use BT's smtp server to send out our email via a smarthost and the rDNS comes back to hostxx-xx-xx-xx.in-addr.btopenworld.com not our actual IP.

The reason for this that that we cannot send emails to virgin or blueyonder email addresses

Please see here as we have the same issue
http://community.virginmedia.com/t5/Email-Cloud-and-Webspace/En-explained-email-bounce-back-why-is-it-suddenly-happening-and/td-p/2875244
Andy MIT Systems ManagerCommented:
Yep, that is likely due to the reverse dns not matching up. If you contact BT with your account details, the external IP address of your internet line and the reverse dns hostname you want to use they will get that sorted for you (usually within 48 hours).
Will SzymkowskiSenior Solution ArchitectCommented:
As everyone has stated for Reverse DNS you need to contact your ISP specifically. If you have multiple IP's in your block, then you will also need to configure the correct external IP address on your firewall as well.

Will.
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