[Bug 777868] Re: Postfix smtp can no longer resolve localhost - regression from maverick.

[Matthias Andree]

Additional remark: Bug #764096 is about an incomplete chroot setup caused by the start script.
To differentially diagnose this, I had ruled a broken chroot setup out in my testing by forcing smtp(8) outside the chroot per master.cf.

This bug is fundamentally a resolver bug, exhibited through a change in
Postfix's default policy which flags to pass to/strip from res_search().

Arguably I should be using 127.0.0.1 or ::1 instead of localhost
(suggested by Victor Duchovni on postfix-users) to skip the DNS
indirection, but "localhost" has been working well since Ubuntu 9.10 or
so, so I'd taken the time to notify Ubuntu in addition to the upstream.

I see this bug as a tracking bug for if and only if you want to provide
a workaround in Postfix (as suggested initially) while Bug #777855 is
still unfixed.

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https://bugs.launchpad.net/bugs/777868

Title:
  Postfix smtp can no longer resolve localhost - regression from
  maverick.