Reverse DNS for eyeballs?

Fri Apr 21 18:03:48 UTC 2023

We actually manually list our customer ranges in pbl, or at least used to.
 Probably something else that I need to check on.

On Fri, Apr 21, 2023, 8:04 AM Lukas Tribus <lukas at ltri.eu> wrote:

> Hello,
>
>
> without PTRs you will probably get your prefixes listed in things like
> Spamhouse PBL. So adding the correct PTR for a mailserver may not be
> enough, as services like that love to classify entire IP blocks. Of
> course Spamhaus provides the tools to fix this issue. But what if
> there are 4 - 5 other services like that? Do you want to go down that
> rabbit hole, everytime you turn up a mailserver in your prefix?
>
> I also think reverse DNS records are useful when you have discussions
> with content providers for all sorts of reasons like geolocation
> issues or "VPN" classifications.
>
> Of course whois/irr records are the proper tools for this. But if I
> have to discuss my IP ranges with some first level support desk at a
> large content provider, everything that stands out negatively will
> impact my chances of actually getting it done and how fast it will get
> done.
>
>
> Considering how subjective IP classifications are, I will not return
> NXDOMAIN for v4 addresses if there is even a small chance that it will
> make my life harder at some point in the future.
>
>
> Lukas
>
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