rDNS PTR records - why?
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I should really know the answer to this I guess but...what is the purpose of the reverse DNS pointer records?
I know how they work (IP to FQDN), but when do you need one and for what? And what happens if you don't have it?
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They are rarely important. The only major use of them is as one additional layer of spam protection, but a VERY minor one.
Where you see them used a lot is things like a traceroute. That's what allows you to identify the hops along the route.
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@scottalanmiller said in rDNS PTR records - why?:
They are rarely important. The only major use of them is as one additional layer of spam protection, but a VERY minor one.
Where you see them used a lot is things like a traceroute. That's what allows you to identify the hops along the route.
Okay, so if you're sending email directly from your own IPs or setting up your own BGP routers then you need to think about reverse DNS. In all other cases you can just ignore it?
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@Pete-S said in rDNS PTR records - why?:
your own IPs
They really need to be your own IPs (reassigned because no end account ever actually owns them) and not just a randoms static IP from your ISP.
Enterprise fiber is one of the few places where i know the IP addresses are mine. I know they are, because I have the ARIN account for them.
