[Discuss] Any Postfix + ipv6 people out there?

[Daniel Hagerty]

"Derek Atkins" <derek at ihtfp.com> writes:

> Yes, I'm sure.  I need this to work for a while during a transition phase.
> Right now my ipv6 address space is over a tunnel that I do not want to use
> for general traffic, which is why I don't want to just turn on v6 for
> everything.  I'd be happy to somehow turn off link local addresses, but I
> don't know how to do that, frankly.  But honestly it should be
> straightforward to debug postfix to figure out why it's blocking my local
> hosts when they come in via v6 link-local but not when they come in via
> v6-public or via v4.

    ULA (rfc4193, fd00::/8 addresses that you generate randomly, don't
need scope)?  You can't turn link local off, it's similar to "I want to
run tcp without this pesky IP thing".  Unlike link-local, ULA isn't
magic "no-routing, avoid selecting this address" sauce.  Much like
rfc1918 in these regards.

    ACL processing is a specific area that's prone to breakage when
something has a slight flub in link-local handling.  The fact that it
let you specify nonsense without complaining doesn't make me feel warm
and fuzzy about it's handling of link local being 100% sane.

    Can't help you with the detailed postfix debugging, it hasn't given
me a lot of reason to get that angry with in longer than memory for that
level of detail.  The source is somewhat approachable as I remember, if
only to find out how to crank the debugging up.