Spamassassin
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install the packages. Also install pyzor and razor
create a user "spamfilter"
/etc/spamassassin/local.cf
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# This is the right place to customize your installation of SpamAssassin.
#
# See 'perldoc Mail::SpamAssassin::Conf' for details of what can be
# tweaked.
#
###########################################################################
#
# Debian standard stuff
#
# rewrite_header Subject *****SPAM*****
# report_safe 1
# trusted_networks 212.17.35.
# lock_method flock
# SpamAssassin config file for version 3.x
# NOTE: NOT COMPATIBLE WITH VERSIONS 2.5 or 2.6
# See http://www.yrex.com/spam/spamconfig25.php for earlier versions
# Generated by http://www.yrex.com/spam/spamconfig.php (version 1.50)
# How many hits before a message is considered spam.
required_score 7.0
# Change the subject of suspected spam
rewrite_header subject **Tripany says: SPAM**
# Encapsulate spam in an attachment (0=no, 1=yes, 2=safe)
report_safe 1
# Enable the Bayes system
use_bayes 1
use_bayes_rules 1
bayes_path /var/spool/spamassassin/bayes
bayes_file_mode 0666
# Enable Bayes auto-learning
bayes_auto_learn 1
# Enable or disable network checks
skip_rbl_checks 0
use_razor2 1
use_dcc 1
use_pyzor 1
# Mail using languages used in these country codes will not be marked
# as being possibly spam in a foreign language.
ok_languages all
# Mail using locales used in these country codes will not be marked
# as being possibly spam in a foreign language.
ok_locales all
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in /etc/postfix/master.cf
change
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smtp inet n - - - - smtpd
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to
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smtp inet n - - - - smtpd
-o content_filter=spamassassin
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At the bottom of master.cf add
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spamassassin unix - n n - - pipe
user=spamfilter argv=/usr/bin/spamc -f -e /usr/sbin/sendmail -oi -f $(sender) $(recipient)
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This way we throw the mail through spamc, which then filters it through spamd before delivery to the mailbox, instead of sending it through spamassassin itself, which has no control over the amount of process forks it spawns etc. Spamd spawns a certain amount of processes and sticks to them, so it doesn't bring the machine to it's knees.
Per user preferences can be adjusted in ~/.spamassassin/user_prefs (eg. they can turn it off!)
then set /etc/default/spamassassin
ENABLED = 1
/etc/init.d/spamassassin start
to start spamd.
check /var/log/mail/spamd.log to see what's going on.
To start razor you have to
$ razor-client [creates symbolic links]
$ razor-admin --create [creates the razor home]
$ razor-admin --register [registers an account]
There's a few options to be found in /etc/default/spamassassin (such as that the logfile is in /var/log/mail/spamd.log
NB. Spamassassin doesn't do any deleting in and of itself - it needs another filter (procmail) to do this. So filters in /etc/procmailrc are still run. If you need a personal filter for a single user, you need a
~/.procmailrc
file.
To simply delete all the spamassassin tagged spam, fill the file with
----------------
:0 HB
* Tripany says: SPAM
/dev/null
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