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Re: "reject_unknown_reverse_client_hostname" bouncing mail when name server is down
From: Wietse Venema (wietse
porcupine.org)
Date: Thu Aug 24 2006 - 06:16:34 CDT
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Jordan Russell:
> Wietse Venema wrote:
> > Jordan Russell:
> >> Does an unreachable name server not count as a "temporary problem"?
> >
> > That depends entirely on what your SYSTEM library routines do.
> >
> > Don't shoot Postfix. It is only the MESSENGER.
>
> Okay, I looked into this some more...
>
> Postfix is expecting getnameinfo() to return EAI_AGAIN for temporary
> failures. I took a look at the current getnameinfo() implementations in
> glibc and FreeBSD's libc, and found that neither return EAI_AGAIN for
> any reason. Rather, when they fail to retrieve a name, they return
> EAI_NONAME regardless of whether the failure is permanent or temporary
> in nature. See:
That would be a bug in the library. The solution is to send a bug
report and request that it be fixed.
Wietse
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