[Exim] Addendum to spam detection.

More spam filter tricks.

# Spam often contains UPPERCASE PROMOTIONAL WORDS!!!

# using CONTAINS in UPPERCASE makes it CaSe SeNsItIvE

if "$h_subject: $message_body:" CONTAINS "FREE"
or "$h_subject: $message_body:" CONTAINS "NOW"
or "$h_subject: $message_body:" CONTAINS "MONEY"
or "$h_subject: $message_body:" CONTAINS "SEX"
or "$h_subject: $message_body:" CONTAINS "HOTTEST"
or "$h_subject: $message_body:" CONTAINS "CASH"
or "$h_subject: $message_body:" CONTAINS "CLICK"
or "$h_subject: $message_body:" CONTAINS "HOTTEST"