Package: postfix Version: 2.1.5-9 Severity: normal Not sure if this is a postfix problem or one related to the underlying gethostbyname calls.
DNS queries consistently reference the local resolver's domain search list, i.e. the 'search domain' lines in /etc/resolv.conf, even when domains are fully qualified, resulting in a lot of extraneous dns lookups. The number of extraneous lookups will be equal to the number of domains listed in /etc/resolv.conf. If there are 3 domains listed, then it will be 3 extra dns queries for every 1 dns lookup. On a busy mail server, these dns lookups can be rather expensive, especially in generating a lot of needless network traffic. I noticed the problem when our nameserver (bind) logs began to show thousands of messages showing unauthorized queries to domains listed in the search path of the server running postfix. For example: named[20247]: client 80.80.80.80#49561: query 'hotmail.com.domain.in.search.path/IN' denied -- System Information: Debian Release: 3.1 Architecture: i386 (i686) Kernel: Linux 2.6.8-2-686-smp Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968) Versions of packages postfix depends on: ii adduser 3.63 Add and remove users and groups ii debconf [debconf-2.0] 1.4.30.13 Debian configuration management sy ii dpkg 1.10.28 Package maintenance system for Deb ii libc6 2.3.2.ds1-22 GNU C Library: Shared libraries an ii libdb4.2 4.2.52-18 Berkeley v4.2 Database Libraries [ ii libgdbm3 1.8.3-2 GNU dbm database routines (runtime ii netbase 4.21 Basic TCP/IP networking system -- debconf information excluded -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
