Bug#607576: exim4-config: after upgrade, /etc/exim4/exim4.conf is present and breaks exim

[Andrew Pimlott]

Package: exim4-config
Version: 4.69-9+lenny1
Severity: important

I have a locally-compiled exim4-daemon-custom package, along with the
standard exim4, exim4-base, and exim4-config packages.  Recently, they were
all at 4.69-9 when 4.69-9+lenny1 hit security.  aptitude prompted me to
upgrade exim4, exim4-base, and exim4-config from 4.69-9 -> 4.69-9+lenny1,
and I accepted--probably foolishly, since exim4-daemon-custom was still at
4.69-9.

The result was a major failure.  All of my incoming mail that should have
been delivered was rejected "relay not permitted".  For every reject,
mainlog had:

2010-12-18 06:27:22 no IP address found for host MAIN_RELAY_NETS (during SMTP connection from [69.147.233.108])
2010-12-18 06:27:22 H=[69.147.233.108] F=<webtop at jetline1.com> rejected RCPT <andrew at pimlott.net>: relay not permitted

Actually, this did not happen right away, because the package updates didn't
restart the daemon.  It was only after a routine daemon restart that the
failures started.

I have resolved the problem, but I can't really figure out what happened.
The odd thing I noticed is that when things weren't working, I had an
/etc/exim4/exim4.conf.  Since I've always used Debconf and the "split"
configuration, I did not expect this file to be present.  (But I am not
positive it was not present before, and I don't have a convenient backup to
check.)  It looks like exim4 was taking this config file in preference to
the auto-generated one.  This exim4.conf is identical to
exim4.conf.template, except for whitespace changes.  Also, it is mode 0400
and owned by Debian-exim.  When I move this file out of the way, things
start working again.

So is it possible that my upgrade somehow created the exim4.conf that broke
my configuration?  I understand that getting my packages out of sync the way
I did is probably not supported, but I would still like to get to the bottom
of this.

By the way, my custom package was for SRS and DomainKeys.  I don't have a
lot of custom configuration.

Andrew

-- Package-specific info:
Exim version 4.69 #1 built 03-Jan-2010 17:26:17
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 Experimental_SRS Experimental_DomainKeys
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'
#
# Please note that this is _not_ a dpkg-conffile and that automatic changes
# to this file might happen. The code handling this will honor your local
# changes, so this is usually fine, but will break local schemes that mess
# around with multiple versions of the file.
#
# update-exim4.conf uses this file to determine variable values to replace
# the DEBCONFsomethingDEBCONF strings in the configuration template files.
#
# Most settings found in here do have corresponding questions in the
# Debconf configuration, but not all of them.
#
# This is a Debian specific file

dc_eximconfig_configtype='internet'
dc_other_hostnames='pimlott.net;madstop.net'
dc_local_interfaces=''
dc_readhost=''
dc_relay_domains=''
dc_minimaldns='false'
dc_relay_nets=''
dc_smarthost=''
CFILEMODE='644'
dc_use_split_config='true'
dc_hide_mailname=''
dc_mailname_in_oh='true'
dc_localdelivery='mail_spool'
mailname:pimlott.net

-- System Information:
Debian Release: 5.0.7
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: i386 (i686)

Kernel: Linux 2.6.30.5-xenU (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages exim4-config depends on:
ii  adduser                       3.110      add and remove users and groups
ii  debconf [debconf-2.0]         1.5.24     Debian configuration management sy

exim4-config recommends no packages.

exim4-config suggests no packages.

-- debconf information:
* exim4/dc_other_hostnames: pimlott.net;madstop.net
* exim4/dc_eximconfig_configtype: internet site; mail is sent and received directly using SMTP
  exim4/dc_noalias_regenerate: false
  exim4/no_config: true
  exim4/hide_mailname:
* exim4/dc_postmaster: andrew
  exim4/dc_smarthost:
* exim4/dc_relay_domains:
* exim4/dc_relay_nets:
* exim4/mailname: pimlott.net
  exim4/dc_readhost:
* exim4/use_split_config: true
  exim4/exim4-config-title:
* exim4/dc_localdelivery: mbox format in /var/mail/
* exim4/dc_local_interfaces:
* exim4/dc_minimaldns: false