[AusNOG] IPv6 reverse DNS and Mail ...

[David Beveridge]

On Fri, May 24, 2013 at 11:28 AM, Robert Mibus <mibus at mibus.org> wrote:
> Forgot to CC the list! :)
>>
>> In my experience, retry/fallback mechanisms for DNS servers is more
>> reliable than MTAs. Resolvers that have trouble with dual-stacked
>> nameservers will have huge problems beyond your single site, since so many
>> high-use NSes (roots etc) are already dual-stacked.
>>
>> In any event; as more providers support IPv6 mail, more MTAs will get
>> fixed - and so each day it gets easier for everyone else to assume it'll
>> "just work".
>>
see
http://sourceware.org/bugzilla/buglist.cgi?quicksearch=getaddrinfo
and
https://fedoraproject.org/wiki/Features/FixNetworkNameResolution
This is actually a glibc problem, but Fedora have made the decision
to fix it themselves and then push it back upstream for other distros.