Bug#400790: exim4-config: Reject mail to system users from non-local sources

[Dominic Hargreaves]

Package: exim4-config
Version: 4.63-10
Severity: wishlist

Hi,

Recently I'm seeing spams to various system alias addresses such as
mail, uucp etc. Usually there is no valid reason for these addresses to
be deliverable from remote sources, so an option to simply reject these
from non-local sources which seem valuable. They could still be
deliverable from local submission so that cronmail etc would be
unaffected.

Does this sound like a good idea? I'm happy to implement it in a
package-suitable way if there is interest (otherwise I'll just hack it
together for myself :)

Cheers,

Dominic.

-- Package-specific info:
Exim version 4.63 #1 built 05-Nov-2006 10:39:17
Copyright (c) University of Cambridge 2006
Berkeley DB: Sleepycat Software: Berkeley DB 4.3.29: (September  6, 2005)
Support for: crypteq iconv() IPv6 GnuTLS move_frozen_messages
Lookups: lsearch wildlsearch nwildlsearch iplsearch cdb dbm dbmnz 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: 4.0
  APT prefers testing
  APT policy: (900, 'testing'), (500, 'stable'), (300, 'unstable')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.16-2-k7
Locale: LANG=en_GB.ISO-8859-15, LC_CTYPE=en_GB.ISO-8859-15 (charmap=ISO-8859-15)

Versions of packages exim4-config depends on:
ii  adduser                       3.99       Add and remove users and groups
ii  debconf [debconf-2.0]         1.5.8      Debian configuration management sy

exim4-config recommends no packages.

-- debconf information excluded