Bug#522807: exim4-config: RCPT ACL rejects valid local parts by default

[David Sheldon]

Package: exim4-config
Version: 4.69-9
Severity: minor


By default the configuration will not accept emails with local parts containing a set of rfc-valid characters, which are considered dangerous (@,%,!,/,|,` etc).

It says that if you want you can make this list less restrictive, but if the
default is to reject such mails then we're breaking Postel's Law
  "be liberal in what you accept from others."

If I had an address with those (valid) characters in, then there's not much
point configuring my server to receive emails for it, if it never gets there
because one of the servers in between rejects it.

This is really a compromise between protecting users against themselves and 
keeping the internet free of random blockages.

-- Package-specific info: Exim version 4.69 #1 built 30-Sep-2008 18:26:35
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

-- System Information:
Debian Release: 5.0
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: i386 (i686)

Kernel: Linux 2.6.24-etchnhalf.1-686 (SMP w/4 CPU cores)
Locale: LANG=en_GB, LC_CTYPE=en_GB (charmap=ISO-8859-1)
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 excluded