Re: problem dealing w/ ietf.org mail servers

[Keith Moore <moore at cs.utk.edu>]

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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