How To Use AMaViS With postfix

******************************

 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=./Maildir

  To

  DEFAULTDELIVERY="| /usr/sbin/amavis | /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=./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 $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/"

			}

 	}

            if test $(MTA) = courier ; then \

              chmod 777 $$subdir; \

            fi; \

                if test $(MTA) == courier ; then \

                        chmod 777 $(DESTDIR)$(virusdir); \

		fi; \

  newaliases=newaliases

  newaliases=newalaises

elif test -f "/etc/courier/aliases/system"; then

  aliases=/etc/courier/aliases/system

  newaliases=makealiases

elif test -f "/usr/lib/courier/etc/aliases/system"; then

  aliases=/usr/lib/courier/etc/aliases/system

  newaliases=/usr/lib/courier/sbin/makealiases

  newaliases=

# command line parsing, courier version

# This file is just a place holder, it

# may be needed in the future.

# End courier cmd line parsing

# courier

# error codes

$VIRUSERR = 0;

$REGERR = 75;   # EX_TEMPFAIL from sendmail sysexits.h

# don't run suid

# set path explicitly

$ENV{PATH} = "/bin:/usr/bin:/usr/local/bin";

# End courier

	# sending mail, courier version

	# Courier is using STDIN and STDOUT so there is no

	# need to open the mail file

	while (<$fh>) {

		next if ($seen_xheader == 0 && m/^$X_HEADER_TAG:/o);

		if ($seen_xheader == 0 && m/\A\r?\n\Z/) {

			print STDOUT "$X_HEADER_TAG: $X_HEADER_LINE\n";

			$seen_xheader = 1;

		}

		print STDOUT $_;

	}

	# Pass up the LDA's error code

	do_exit(retcode($?), __LINE__);

# End courier

AC_ARG_ENABLE(courier,

[  --enable-courier              use courier as MTA],

  [if test "x$enableval" = "xyes" ; then

     MTA=courier

   fi])

dnl Need to find out whether sendmail_wrapper is really courier' sendmail

if test "x$MTA" = "xsendmail" ; then

  strings ${sendmail_wrapper} | grep -i courier >/dev/null 2>&1

  if test $? -eq 0 ; then

    MTA=courier

  fi

fi

if test "x$MTA" != "xcourier" ; then

if test "x$MTA" != "xcourier" ; then