Debian Bug report logs - #470852
postfix: Wildcard virtual alias maps cause unwanted bounces

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Michael Richters <merlin@nutwerk.org>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: postfix: Wildcard virtual alias maps cause unwanted bounces

Date: Thu, 13 Mar 2008 20:57:01 -0400

Package: postfix
Version: 2.5.1-1
Severity: important

After upgrading to postfix 2.5.1-1, I started seeing many bounces sent back to
bogus (spam) addresses.  I have a number of virtual_alias_domains on my
server, and some of the virtual_alias_maps use wildcard addresses.  For
example:

@virtdomain.net         @realdomain.net

Mail sent from <spammer@fake.addr> to <bogus@realdomain.net> doesn't cause a
bounce message to be sent to <spammer@fake.addr>, but the same message sent to
<bogus@virtdomain.net> causes postfix 2.5.1-1 to try to deliver a bounce to
<spammer@fake.addr>, causing my mail queue to fill up with undeliverable
bounces, and possibly resulting in my server getting on some black lists.
Reverting to postfix 2.4.6-3 fixes this problem.

Further investigation reveals that if there are no wildcard virtual alias
maps, these bounces are not sent, but I don't want to put dozens of entries in
each of several virtual alias map file (one for each domain), when what I
really want is to map the whole domain.

  --MR

-- System Information:
Debian Release: lenny/sid
  APT prefers testing
  APT policy: (500, 'testing'), (500, 'stable'), (50, 'unstable')
Architecture: i386 (i686)

Kernel: Linux 2.6.22-2-686 (SMP w/2 CPU cores)
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968) (ignored: LC_ALL set to C)
Shell: /bin/sh linked to /bin/bash

Versions of packages postfix depends on:
ii  adduser                  3.106           add and remove users and groups
ii  debconf [debconf-2.0]    1.5.19          Debian configuration management sy
ii  dpkg                     1.14.16.6       package maintenance system for Deb
ii  libc6                    2.7-6           GNU C Library: Shared libraries
ii  libdb4.6                 4.6.21-6        Berkeley v4.6 Database Libraries [
ii  libsasl2-2               2.1.22.dfsg1-18 Cyrus SASL - authentication abstra
ii  libssl0.9.8              0.9.8g-4        SSL shared libraries
ii  lsb-base                 3.1-24          Linux Standard Base 3.1 init scrip
ii  netbase                  4.30            Basic TCP/IP networking system
ii  ssl-cert                 1.0.16          simple debconf wrapper for OpenSSL

postfix recommends no packages.

-- debconf information:
  postfix/master_upgrade_warning:
  postfix/db_upgrade_warning: true
* postfix/mailname: geomancer.gedankenlabs.org
  postfix/tlsmgr_upgrade_warning:
  postfix/dynamicmaps_upgrade_warning:
* postfix/recipient_delim: +
* postfix/main_mailer_type: Internet Site
  postfix/transport_map_warning:
* postfix/retry_upgrade_warning: true
  postfix/kernel_version_warning:
  postfix/relayhost:
* postfix/procmail: true
  postfix/bad_recipient_delimiter:
* postfix/chattr: false
* postfix/root_address: NONE
  postfix/rfc1035_violation: false
* postfix/mydomain_warning: true
* postfix/mynetworks: 127.0.0.0/8
* postfix/destinations: $myhostname, localhost, nutwerk.org
  postfix/nqmgr_upgrade_warning:
  postfix/not_configured:
* postfix/mailbox_limit: 0
* postfix/protocols: all

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