How To Use AMaViS With courier
******************************

 By Lars Hecking <lhecking@users.sourceforge.net>
 Modified for Courier by Jim Gifford <giffordj@linkline.com>

  This setup requires Courier and Maildrop.

  You'll also need external unpackers, like arc etc.

  And yes, you need to have a virusscanner installed; and it must be
  in the $PATH environment variable.

  Also, a problem one might run into is some weird configure output
  about undefined macros. To fix this, one needs to install:

  http://cryp.to/autoconf-archive/Installed_Packages/acx_pthread.m4
  into the directory specified by 'aclocal --print-ac-dir' and then rerun 
  aclocal && automake && autoconf !

  In this configuration, amavis runs under a non-privileged user id
  (by default: amavis). Make sure it exists before proceeding.  If  a different
  user is chosen, use the "--with-amavisuser=USER" configure option for amavis.

  So, if you use defaults

  ./configure  --enable-courier

  it should work.

  Configuring courier itself is very simple:

  * a change to /etc/courier/courierd or /usr/lib/etc/courier/courierd:

  From
  DEFAULTDELIVERY="| /usr/bin/maildrop"
  or
  DEFAULTDELIVERY=./Mail/Maildir

  To
  DEFAULTDELIVERY="| /usr/sbin/amavis.courier | /usr/bin/maildrop"

  This is the recommended setup for Amavis. There is an alternative
  method which is listed below.

  * a change to /etc/courier/courierd or /usr/lib/etc/courier/courierd:

  From
  DEFAULTDELIVERY=./Mail/Maildir

  To
  DEFAULTDELIVERY="| /usr/bin/maildrop"

  * add to /etc/courier/maildroprc or /usr/lib/etc/courier/maildroprc:
 
   # Virus Scan
   #
   import SENDER
   import RECIPIENT

   xfilter "/usr/sbin/amavis.courier $SENDER $RECIPIENT"

  Additional Maildroprc rules

  If you would like to put your infected emails into their own Maildir
  you can add the following line to your maildroprc file. Make sure
  you create the Maildir or this rule will not work properly

  if (/^Subject:.*VIRUS IN*/)
	{
		exception {
			to "$DEFAULT/.Virus/"
			}
 	}