houston.rr.com MX fubar?
Mark Andrews
Mark_Andrews at isc.org
Tue Jan 15 04:00:25 UTC 2008
> > Fallback to A should be removed sure sounds like a plan.
>
> great idea. it will only break mail to 42% of the internet.
Since there is no fallback to AAAA, in a few years it will
break very little as most of the internet will have IPv6
MTA's (and hence MX's) for their mail domains.
MX fallback to A should have had a sunset time added to it
when it was originally proposed. It is, after all, only a
transition strategy. We can still add a sunset clause.
MTA's would lookup their own MX records for the mail domains
they are configured as final delivery agents for and if not
found log that there are missing MX records.
Mark
> http://en.wikipedia.org/wiki/Principle_of_least_astonishment
>
> randy
--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews at isc.org
More information about the NANOG
mailing list