Bug#760278: exim4: no longer uses the FQDN as the HELO value

[Vincent Lefevre]

Package: exim4
Version: 4.84-2
Severity: grave
Justification: causes non-serious data loss

Exim no longer uses the FQDN as the HELO value:

Received: from ypig (ypig.lip.ens-lyon.fr [140.77.13.48])
        by ioooi.vinc17.net (Postfix) with ESMTPS id B5077988;
        Tue,  2 Sep 2014 14:48:45 +0200 (CEST)

This behavior is invalid and this can cause loss of mail with servers
using aggressive antispam rules. Note that "exim4 -bP" output has
changed from

  primary_hostname = ypig.lip.ens-lyon.fr

to

  primary_hostname = ypig

after an upgrade, perhaps due to the libnss-myhostname installation
(as a Recommends). Moreover,

$ hostname -f
ypig.lip.ens-lyon.fr

which is OK. So, it appears that exim4 does something wrong.

-- Package-specific info:
Exim version 4.84 #3 built 29-Aug-2014 18:34:30
Copyright (c) University of Cambridge, 1995 - 2014
(c) The Exim Maintainers and contributors in ACKNOWLEDGMENTS file, 2007 - 2014
Berkeley DB: Berkeley DB 5.3.28: (September  9, 2013)
Support for: crypteq iconv() IPv6 GnuTLS move_frozen_messages DKIM PRDR OCSP
Lookups (built-in): lsearch wildlsearch nwildlsearch iplsearch cdb dbm dbmjz 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 generate
# exim configuration macros for the configuration file.
#
# 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='ypig.lip.ens-lyon.fr'
dc_local_interfaces='127.0.0.1 ; ::1'
dc_readhost=''
dc_relay_domains=''
dc_minimaldns='false'
dc_relay_nets=''
dc_smarthost=''
CFILEMODE='644'
dc_use_split_config='false'
dc_hide_mailname=''
dc_mailname_in_oh='true'
dc_localdelivery='maildir_home'
mailname:ypig.lip.ens-lyon.fr

-- System Information:
Debian Release: jessie/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.14-2-amd64 (SMP w/8 CPU cores)
Locale: LANG=POSIX, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages exim4 depends on:
ii  debconf [debconf-2.0]  1.5.53
ii  exim4-base             4.84-2
ii  exim4-daemon-light     4.84-2

exim4 recommends no packages.

exim4 suggests no packages.

-- debconf information:
* exim4/drec: