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On Thu, 2013-01-10 at 13:08 +1000, Julian DeMarchi wrote:
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On 01/10/2013 01:04 PM, Paul Fraser wrote:
> Not that I agree with it, but I thought this was pretty much the norm as a spam mitigation technique...
A /32 yes. You can't block a whole /24 for no PTRs... I wouldn't be
running 252 mail servers on one subnet...
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RFC 1912, Section 2.1 says every Internet-reachable host should have a name and "Make sure your PTR and A records match" and "For every IP address, there should be matching PTR record in the in-addr.arpa domain"<BR>
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its DNS 101<BR>
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but I agree they have taken things to the extreme IF you DID have some hosts with valid A and PTR's in that block.<BR>
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Just as well they are not commonly used, perhaps this is why, just as bad a apews and a few others.<BR>
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