Hi,

I want to know if it would be possible a spamassassing configuration
that allows me execute spamassassing just in case a header mail exists
with a defined value.

System configuration is the following:

Spamassassing: /etc/spamassassin/

rewrite_header Subject *****SPAM*****
report_safe 0
required_score 3.5
use_bayes 1
bayes_auto_learn 1
bayes_learn_during_report 1
bayes_auto_expire 1
bayes_expiry_max_db_size 150000
bayes_journal_max_size 102400
bayes_use_hapaxes 1
use_pyzor 0
use_razor2 1
allow_user_rules 1


Postfix: /etc/postfix/spamassassin

smtp      inet  n       -       n       -       80       smtpd -o
content_filter=spamassassin
pickup    fifo  n       -       -       60      1       pickup -o
receive_override_options=no_header_body_checks
cleanup   unix  n       -       -       -       0       cleanup
qmgr      fifo  n       -       n       300     1       qmgr
tlsmgr    unix  -       -       -       1000?   1       tlsmgr
rewrite   unix  -       -       -       -       -       trivial-rewrite
bounce    unix  -       -       -       -       0       bounce
defer     unix  -       -       -       -       0       bounce
trace     unix  -       -       -       -       0       bounce
verify    unix  -       -       -       -       1       verify
flush     unix  n       -       -       1000?   0       flush
proxymap  unix  -       -       n       -       -       proxymap
smtp      unix  -       -       -       -       -       smtp
# When relaying mail as backup MX, disable fallback_relay to avoid MX loops
relay     unix  -       -       -       -       -       smtp
        -o fallback_relay=
#       -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
showq     unix  n       -       -       -       -       showq
error     unix  -       -       -       -       -       error
discard   unix  -       -       -       -       -       discard
local     unix  -       n       n       -       -       local
virtual   unix  -       n       n       -       -       virtual
lmtp      unix  -       -       -       -       -       lmtp
anvil     unix  -       -       -       -       1       anvil
scache    unix  -       -       -       -       1       scache
spamassassin    unix    -       n       n       -       -       pipe
user=spamd argv=/usr/bin/spamc -f -e /usr/sbin/sendmail -oi -f ${sender}
-- ${recipient}
policy    unix  -       n       n       -       -       spawn  
user=nobody     argv=/usr/bin/perl /usr/sbin/postfix-policyd-spf-perl



With this configuration, each mail that receives postfix is scanned
before sending to each user. My idea is that spamassassin scans only in
case mail received has a header added by another SMTP. My SMTP receives
mails that have been received before for the Enterprise SMTP. That
Enterprise SMTP add a header called "X-imss-result:". Depending on the
value of this header, I would like to configure SpamAssassing for
execute scan just in case this header has a value equal to
"Default_Triggered"; in other cases, mail will be sent to user with no scan.

Any idea?