[exim] spamd keeps running at 99% CPU until i kill the proce…

Hello,

We are running SpamAssassin version 3.1.7-deb running on Perl version
5.8.4 on a Debian Sarge box with exim4.

I am using the following router:

======================================================================
sa_router:
   no_verify
   check_local_user
   # When to scan a message :
   # - it isn't already flagged as spam from Spamassassin
   # - it isn't already scanned
   # - it isn't local
   # - it isn't from one internal domain user to another
   condition = "${if and { \
                         {!eq {$received_protocol}{spam-scanned}} \
                         {!eq {$received_protocol}{local}} \
                         {!eq {$sender_address_domain}{$domain}} \
                         } \
                         {1}{0}}"
   driver    = accept
   transport = sa_spamcheck
   local_parts = /etc/spamassassinUsers
======================================================================

and the following transport:

======================================================================
sa_spamcheck:
driver = pipe
command = /usr/sbin/exim4 -oMr spam-scanned -bS
use_bsmtp = true
transport_filter = /usr/bin/spamc
home_directory = "/tmp"
current_directory = "/tmp"
user = spamcheck
group = spamcheck
log_output = true
return_fail_output = true
return_path_add = false
message_prefix =
message_suffix =
======================================================================

This always used to work perfectly until i upgraded spamassassin using
apt-get to the version above (which was done in order to give us access
to the "sa-update" command).

Now, on some emails spamd eats up 99% CPU and doesn't return until i
kill it, at which point the email is delivered as non-spam, whether it
is spam or not.

Does anyone know why this is happening? It's destroying the use of our
mail server, lol!

Also, FYI, here is a copy of /etc/spamassassin/local.cf:

======================================================================
# This is the right place to customize your installation of SpamAssassin.
#
# See 'perldoc Mail::SpamAssassin::Conf' for details of what can be
# tweaked.
#
# Only a small subset of options are listed below
#
###########################################################################

rewrite_subject 1

# Add *****SPAM***** to the Subject header of spam e-mails
#
rewrite_header Subject ****SPAM**** (_HITS_/_REQD_):


# Save spam messages as a message/rfc822 MIME attachment instead of
# modifying the original message (0: off, 2: use text/plain instead)
#
report_safe 1

#   Set which networks or hosts are considered 'trusted' by your mail
#   server (i.e. not spammers)
#
# trusted_networks 212.17.35.
trusted_networks        192.168.3.
trusted_networks        193.128.142.

# Set file-locking method (flock is not safe over NFS, but is faster)
#
# lock_method flock


# Set the threshold at which a message is considered spam (default: 5.0)
#
required_score 2.5


# Use Bayesian classifier (default: 1)
#
# use_bayes 1


# Bayesian classifier auto-learning (default: 1)
#
# bayes_auto_learn 1


# Set headers which may provide inappropriate cues to the Bayesian
# classifier
#
# bayes_ignore_header X-Bogosity
# bayes_ignore_header X-Spam-Flag
# bayes_ignore_header X-Spam-Status

# WHITELIST
whitelist_from *@equanet.co.uk
whitelist_from *@toshiba.co.jp
whitelist_from *@dsgretail.co.uk
whitelist_from *@dsgibusiness.com
whitelist_from *@dhcltd.com
whitelist_from *@pcwb.com
whitelist_from *@netapp-web.com
======================================================================

Thanks in advance for any assistance! It's greatly appreciated!

Richard.

-- 
Richard Hobbs (Systems Administrator)
Toshiba Research Europe Ltd. - Speech Technology Group
Email: richard.hobbs@???
Web: http://www.toshiba-europe.com/research/
Tel: +44 1223 376964        Mobile: +44 7811 803377