Need help setting up reverse DNS with new ISP
I just switched ISPs, and we've got a lot of our outbound emails being returned which I attribute to reverse DNS not being setup. I need help in understanding how one sets this up(my ISP is USELESS)
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>which I attribute to reverse DNS not being setup
It sounds like you are not sure this is the case - review the exact error message returned when the messages bounce to verify this is indeed the case (or post the bounced message here so we can verify).
>my ISP is USELESS
So, you just switched to an ISP that you consider "useless"? Might I ask why?
In any case, it sounds like your ISP controls the authority for your in-addr.arpa zone. If they are "useless" as you say, you may have to find a less "useless" ISP, as you are going to have to do one of two things:
1. Have them [ISP] configure PTR records for your in-addr.arpa zone (or subset thereof), or
2. Have them delegate DNS authority for your in-addr.arpa zone (or portion thereof) to your local DNS servers,
and then configure your local servers to handle the in-addr.arpa zone PTR lookups.
Hope that helps.
Cheers,
-Jon
It sounds like you are not sure this is the case - review the exact error message returned when the messages bounce to verify this is indeed the case (or post the bounced message here so we can verify).
>my ISP is USELESS
So, you just switched to an ISP that you consider "useless"? Might I ask why?
In any case, it sounds like your ISP controls the authority for your in-addr.arpa zone. If they are "useless" as you say, you may have to find a less "useless" ISP, as you are going to have to do one of two things:
1. Have them [ISP] configure PTR records for your in-addr.arpa zone (or subset thereof), or
2. Have them delegate DNS authority for your in-addr.arpa zone (or portion thereof) to your local DNS servers,
and then configure your local servers to handle the in-addr.arpa zone PTR lookups.
Hope that helps.
Cheers,
-Jon
Agreed. If you have less than a Class C, you need the ISP to either set this up, or delegate it to you -- you can't make it work without them.
>If you have less than a Class C, you need the ISP to either set this up, or delegate it to you
Even if the network in question is a full /24, the assistance of the upstream is likely required...
Cheers,
-Jon
Even if the network in question is a full /24, the assistance of the upstream is likely required...
Cheers,
-Jon
I had to go through this a few weeks ago so I think I can help you.
E-mails were rejected from mail servers which performed a reverse lookup.
If I undrestand correct you are hosting your own External DNS server and you do not have a reverse lookup zone.
There are two questions which I need the you to answer:
1.What is the OS which you are using for your DNS server?
2.What is the IP range provided by your ISP (most probably you do not have a whole C class so setting the reverse zone is a liitle bit specific).
Waiting for your answers :)
NetoMeter