Jeroen Massar wrote:
On Wed, Jul 02, 2008 at 10:47:53PM -0700, 'kent' wrote:
[..]
However, this last address, 2001:470:1:76:2c0:9fff:fe3e:4009, is not
explicitly configured on the sending server; instead, it is being
implicitly
configured through ip6 autoconf stuff:
Which (autoconfig) you should either not be using on servers, or you
should be configuring your software properly to select the correct
outbound address.
that's a bizarre statement. the distinction between a client and a
server is an artificial one. either autoconfig is useful for all kinds
of machines, or it's almost useless.
(I prefer to use the autoconfig one for 'management' and using a
'service address' for the service).
SMTP shows that it is perfectly usable for these situations as it
nicely rejects the message with a proper message automatically telling
you on how to solve it.
... and the message almost always goes to someone who isn't in a
position to fix the problem.
That is to say, it appears the ietf.org mail server is probably now
rejecting
mail from *any* box that is getting a default global ipv6 address, since
those addresses will most likely not be in ip6.arpa. There may be a
whole
lot of boxes in this situation.
Those boxes are not set up correctly thus should not be sending email
in the first place.
people have strange ideas about what is "correct" setup.
Keith
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