Bug#896651: exim4-daemon-heavy: Updates on Avast protocol in Exim. Please backport changes to version 4.89 for use in Debian 9

[Luca Bertoncello]

Package: exim4-daemon-heavy
Version: 4.89-2+deb9u2
Severity: important

Dear Maintainer,


Due to an error in the Avast protocol E-Mails that cannot be scanned from Avast (eg: password protected ZIP, and so on) result
in "blackhole" and will be sent again.

The problem has already a solution contained in these patches of Exim:

91e974f5 Avast: rework interface
eb445b04 Avast: implement pass_unscanned option
ad93c40f Avast: improve compliance with avast-protocol(5)
71bb51e0 Update to protocol used by avast 2.2.0 (Multiline responses) (Bug 2112)

The version 4.91 of Exim already include them.
It will be nice if they will be backported to the version 4.89, distributed in Debian 9.

Thanks a lot
Luca Bertoncello


-- Package-specific info:
Exim version 4.89 #1 built 28-Nov-2017 21:58:00
Copyright (c) University of Cambridge, 1995 - 2017
(c) The Exim Maintainers and contributors in ACKNOWLEDGMENTS file, 2007 - 2017
Berkeley DB: Berkeley DB 5.3.28: (September  9, 2013)
Support for: crypteq iconv() IPv6 PAM Perl Expand_dlfunc GnuTLS move_frozen_messages Content_Scanning DKIM DNSSEC Event OCSP PRDR PROXY SOCKS TCP_Fast_Open
Lookups (built-in): lsearch wildlsearch nwildlsearch iplsearch cdb dbm dbmjz dbmnz dnsdb dsearch ldap ldapdn ldapm mysql nis nis0 passwd pgsql sqlite
Authenticators: cram_md5 cyrus_sasl dovecot plaintext spa tls
Routers: accept dnslookup ipliteral iplookup manualroute queryprogram redirect
Transports: appendfile/maildir/mailstore/mbx autoreply lmtp pipe smtp
Fixed never_users: 0
Configure owner: 0:0
Size of off_t: 8
Configuration file is /etc/exim4/exim4.conf
mailname:mail.queo-group.com
# /etc/default/exim4
EX4DEF_VERSION=''

# 'combined' -	 one daemon running queue and listening on SMTP port
# 'no'       -	 no daemon running the queue
# 'separate' -	 two separate daemons
# 'ppp'      -   only run queue with /etc/ppp/ip-up.d/exim4.
# 'nodaemon' - no daemon is started at all.
# 'queueonly' - only a queue running daemon is started, no SMTP listener.
# setting this to 'no' will also disable queueruns from /etc/ppp/ip-up.d/exim4
QUEUERUNNER='combined'
# how often should we run the queue
QUEUEINTERVAL='30m'
# options common to quez-runner and listening daemon
COMMONOPTIONS=''
# more options for the daemon/process running the queue (applies to the one
# started in /etc/ppp/ip-up.d/exim4, too.
QUEUERUNNEROPTIONS=''
# special flags given to exim directly after the -q. See exim(8)
QFLAGS=''
# Options for the SMTP listener daemon. By default, it is listening on
# port 25 only. To listen on more ports, it is recommended to use
# -oX 25:587:10025 -oP /run/exim4/exim.pid
SMTPLISTENEROPTIONS=''

-- System Information:
Debian Release: 9.3
  APT prefers stable
  APT policy: (990, 'stable'), (500, 'proposed-updates')
Architecture: amd64 (x86_64)

Kernel: Linux 4.9.0-5-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages exim4-daemon-heavy depends on:
ii  debconf [debconf-2.0]  1.5.61
ii  exim4-base             4.89-2+deb9u2
ii  libc6                  2.24-11+deb9u1
ii  libdb5.3               5.3.28-12+deb9u1
ii  libgnutls30            3.5.8-5+deb9u3
ii  libldap-2.4-2          2.4.44+dfsg-5+deb9u1
ii  libmariadbclient18     10.1.26-0+deb9u1
ii  libpam0g               1.1.8-3.6
ii  libpcre3               2:8.39-3
ii  libperl5.24            5.24.1-3+deb9u2
ii  libpq5                 9.6.6-0+deb9u1
ii  libsasl2-2             2.1.27~101-g0780600+dfsg-3
ii  libsqlite3-0           3.16.2-5+deb9u1

exim4-daemon-heavy recommends no packages.

exim4-daemon-heavy suggests no packages.

-- debconf information:
  exim4-daemon-heavy/drec: