Peter Rabbitson:
> Hi,
>
> 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
The Postfix SMTP client sets the RES_DEFNAMES flag when it invokes
the resolver(3) system library routines to look up the destination
host IP address.
According to my manual pages,
RES_DEFNAMES If set, res_search() will append the default domain name
to single-component names (those that do not contain a
dot). This option is enabled by default.
Wietse
