Got an off topic couple of questions for you guys.
When I use the DNSReport page it always shows an error on the reverse DNS, but when I test the reverse DNS from www.dnsstuff.com it comes up fine.
That's due to a bug (feature?) in BIND v8 and earlier, where it will intentionally ignore reverse DNS requests the first time that they are requested (technically, it's a bit more detailed). If you've ever done work with reverse DNS lookups (using nslookup or dig, for instance) and wondered why they often take much, much longer than standard DNS lookups, it's because you've encountered this bug. The DNS Report just uses a standard reverse DNS lookup request to BIND, which chokes. If you reload the page, though, the correct results will appear.
This isn't an issue with the www.DNSstuff.com page, because it bypasses BIND completely (mimicking what BIND does, except that it won't drop the lookup halfway through).
Also, I'm unsure of what to do about failing the new domain literals test.
It would likely be easiest to ignore that for now. The two drawbacks to not having it set up properly are [1] Testing can be more difficult, and [2] People who know of a problem with your mailserver that know the IP but not any domains it hosts won't be able to reach you.
-Scott
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