On Tue, Sep 23, 2008 at 04:23:56PM +0200, Peter Rabbitson wrote:
> I encountered a weird behavior with Postfix when specifying
> smtp:localhost as a transport destination. After long debugging, tcpdump
> revealed that postfix directly asks for 'localhost.<local dns suffix>',
> as specified in /etc/hosts:search without first asking for 'localhost'.
> Is this intended behavior, or is this an omission? I am using stock
> Debian Postfix 2.5.5-1.1
Postfix passes "localhost" to the DNS library. RES_DNSRCH is off,
but RES_DEFNAMES is on. So unqualified names will be qualified
with the default domain. If "smtp_host_lookup" is set to "native",
you get whatever behaviour the C library (per nsswitch.conf) provides.
--
Viktor.
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