[exim] Possible problem with system filter

We use spamassassin and the spamd interface. We used to get lot of spam
marked ** SPAM **. However in the last few days we are getting spam and
they are not marked any more - although spamassassin is doing its work
by marking them.
We did have a system filter in the exim config file which read as
follows:

system_filter = /mail/exim/files/system_filter
and this used to look like this:

if $h_X-New-Subject: is not "" then
        headers remove "Subject"
        headers add "Subject: $h_X-New-Subject"
        headers remove "X-New-Subject"
endif

However, we have changed the filter so that it looks as follows:

# Exim filter
#
#
logfile /var/exim/logs/redirect.log
if $sender_address matches "jon.doe@???"
then
        if foranyaddress $h_to:,$h_cc: ($thisaddress matches
"(doej|J.Doe)@"
 )
        then
                logwrite "REDIRECTING email at $tod_log"
                logwrite "sender address: $sender_address"
                logwrite "to: $h_to"
                logwrite "cc: $h_cc"
                logwrite "subject: $h_subject"
                logwrite "deliver to: fred@???\n\n"
                unseen deliver fred@??? errors_to
postmaster@???
                seen finish
        endif
endif

In spamassassin's local.cf, we have
rewrite_header subject **SPAM**

(which as I used to say worked fine - until recently)

Any idea why it broke?

Regards

Sujit

Sujit Choudhury
ISLS
University of Westminster

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