Quanah Gibson-Mount:
> In our IPv6 testing, we've found that postfix is unable to delivery to LMTP
> when running purely in IPv6 mode. All other aspects of postfix work just
> fine.
>
> Here is an example from the log:
>
> Jun 27 05:47:56 lb postfix/lmtp[32685]: BCD8720FE3:
> to=<ad...@lb.multinode1.zimbraqa.lab>, relay=none, delay=17237,
> delays=17236/0.03/0/0, dsn=4.4.3, status=deferred (Host or domain name not
> found. Name service error for name=lb.multinode1.zimbraqa.lab type=AAAA:
> Host not found, try again)
>
> However, the AAAA record exists:
I suspect a site-specific error.
- I know that some people are using Postfix in IPv6-only.
- Also, the LMTP client uses the same DNS lookup code path as (the
SMTP client for next-hop domains inside []).
Possible approach:
- Watch Postfix's DNS queries with tcpdump.
- Turn off chroot:
http://www.postfix.org/DEBUG_README.html#no_chroot
and "postfix reload" after configuration change.
- Check permissions of / /etc /etc/resolv.conf, SeLinux, AppArmor, ...
Wietse
