Bug#530629: exim4: does not try every IP of some MXs

[Lionel Elie Mamane]

Package: exim4
Version: 4.69-11
Severity: normal

master at bagnat:~$ sudo mailq
17m  3.1K 1M8wBu-0004z1-4C <master at mamane.lu>
        D submit at bugs.debian.org
          lionel at mamane.lu
master at bagnat:~$ host a.mx.conuropsis.org
a.mx.conuropsis.org has address 94.142.241.136
a.mx.conuropsis.org has IPv6 address 2a02:898:36:612e:6d78::1

But Exim4 did not try 94.142.241.136:

2009-05-26 15:02:19 Start queue run: pid=19212 -qf
2009-05-26 15:02:19 1M8wBu-0004z1-4C capsaicin.mamane.lu [2001:888:19f0:2:2e0:81ff:fe54:abf9] Network is unreachable
2009-05-26 15:02:19 1M8wBu-0004z1-4C tsomet.mamane.lu [2001:888:19f0:2::a] Network is unreachable
2009-05-26 15:02:19 1M8wBu-0004z1-4C tsomet.mamane.lu [2001:888:19f0::a] Network is unreachable
2009-05-26 15:05:28 1M8wBu-0004z1-4C tsomet.mamane.lu [82.95.233.223] Connection timed out
2009-05-26 15:05:28 1M8wBu-0004z1-4C a.mx.conuropsis.org [2a02:898:36:612e:6d78::1] Network is unreachable
2009-05-26 15:05:28 1M8wBu-0004z1-4C == lionel at mamane.lu R=dnslookup T=remote_smtp defer (101): Network is unreachable

Restarting exim seems to have solved the problem for this time, after
the restart, it connected to 94.142.241.136.

-- Package-specific info:
Exim version 4.69 #1 built 10-May-2009 08:22:44
Copyright (c) University of Cambridge 2006
Berkeley DB: Berkeley DB 4.6.21: (September 27, 2007)
Support for: crypteq iconv() IPv6 GnuTLS move_frozen_messages
Lookups: lsearch wildlsearch nwildlsearch iplsearch cdb dbm dbmnz dnsdb dsearch nis nis0 passwd
Authenticators: cram_md5 plaintext
Routers: accept dnslookup ipliteral manualroute queryprogram redirect
Transports: appendfile/maildir/mailstore autoreply lmtp pipe smtp
Fixed never_users: 0
Size of off_t: 8
Configuration file is /var/lib/exim4/config.autogenerated
# /etc/exim4/update-exim4.conf.conf
#
# Edit this file and /etc/mailname by hand and execute update-exim4.conf
# yourself or use 'dpkg-reconfigure exim4-config'

dc_eximconfig_configtype='internet'
dc_other_hostnames='localhost.localdomain:localhost:bagnat.home.mamane.lu:bagnat.mamane.lu'
dc_local_interfaces='127.0.0.1;::1'
dc_readhost=''
dc_relay_domains=''
dc_minimaldns='false'
dc_relay_nets=''
dc_smarthost='mail.chl.chalmers.se'
CFILEMODE='644'
dc_use_split_config='true'
dc_hide_mailname='false'
dc_mailname_in_oh='true'
dc_localdelivery='mail_spool'
mailname:bagnat.mamane.lu

-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 2.6.26-1-686 (SMP w/1 CPU core)
Locale: LANG=fr_LU.UTF-8, LC_CTYPE=fr_LU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages exim4 depends on:
ii  debconf [debconf-2.0]         1.5.26     Debian configuration management sy
ii  exim4-base                    4.69-11    support files for all Exim MTA (v4
ii  exim4-daemon-light            4.69-11    lightweight Exim MTA (v4) daemon

exim4 recommends no packages.

exim4 suggests no packages.

-- debconf information:
  exim4/drec: