##
## Please add loadplugin to init.pre (so it's loadeded before cf files!):
##
## loadplugin Mail::SpamAssassin::Plugin::FreeMail FreeMail.pm
##

ifplugin Mail::SpamAssassin::Plugin::FreeMail

header FREEMAIL_REPLYTO eval:check_freemail_replyto()
describe FREEMAIL_REPLYTO Reply-To is different freemail than From or body
score FREEMAIL_REPLYTO 2

header __freemail_reply eval:check_freemail_replyto('reply')
meta FREEMAIL_REPLY (__freemail_reply && !FREEMAIL_REPLYTO)
describe FREEMAIL_REPLY From and body are different freemails
score FREEMAIL_REPLY 1

header FREEMAIL_FROM eval:check_freemail_from()
describe FREEMAIL_FROM Sender email is freemail
score FREEMAIL_FROM 0.5

### Some other possibilities:

# header FREEMAIL_FROM_DIGIT eval:check_freemail_from('\d@')
# describe FREEMAIL_FROM_DIGIT Freemail username ends in digit
# score FREEMAIL_FROM_DIGIT 0.5

# header FREEMAIL_FROM_YEAR eval:check_freemail_from('[^\d](20)?(0[7-9]|1[0-2])@')
# describe FREEMAIL_FROM_YEAR Freemail username ends in year 2007-2012
# score FREEMAIL_FROM_YEAR 0.1

# header FREEMAIL_BODY eval:check_freemail_body()
# describe FREEMAIL_BODY Email address found from body is freemail
# score FREEMAIL_BODY 0.001

# header __freemail_replyto_hdr eval:check_freemail_header('Reply-To')
# meta FREEMAIL_BODY_ONLY (!FREEMAIL_FROM && !__freemail_replyto_hdr && FREEMAIL_BODY)
# describe FREEMAIL_BODY_ONLY No freemails in headers, only in body
# score FREEMAIL_BODY_ONLY 0.001

### You could also do more serious whitelisting:

# header __freemail_replyto  eval:check_freemail_replyto()
# body   __freemail_skip_fwd /---\s?(?:Forwarded|Original) message/i
# header __freemail_skip_ml1 exists:List-Id
# header __freemail_skip_ml2 exists:Mailing-List
## skip body larger than 5000 bytes
# body   __freemail_skip_big /(?=.{5000})./s
# meta FREEMAIL_REPLYTO __freemail_replyto && !(BAYES_00 || __freemail_skip_fwd || __freemail_skip_ml1 || __freemail_skip_ml2 || __freemail_skip_big)

endif