Wietse Venema wrote: > 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. >
As far as I can tell this is a flag set in dns_lookup.c, which can not be controlled by external methods. So short from recompiling postfix, one either has to use [127.0.0.1] in place of localhost, or remove search xxx from /etc/resolv.conf, correct? Peter
