Sendmail

Spam and Virus Filtering Con't

Step 8: Configure Spamassassin

This Spamassassin configuration file is what I have merged from the references at the bottom. Please paste this content in your /etc/mail/spamassassin/local.cf file

# SpamAssassin config file for version 3.x
# NOTE: NOT COMPATIBLE WITH VERSIONS 2.5 or 2.6
# Partially Generated by http://www.yrex.com/spam/spamconfig.php
# (version 1.50)
# Partially taken from:
# http://www.stearns.org/doc/spamassassin-setup.current.html
# Partially added my own

# How many hits before a message is considered spam.
required_score 7.5

# Change the subject of suspected spam
rewrite_subject 1
rewrite_header subject [SPAM]

# Encapsulate spam in an attachment (0=no, 1=yes, 2=safe)
report_safe 0

# Enable the Bayes System
use_bayes 1
bayes_path /home/sharedspam/.spamassassin/bayes
auto_whitelist_path /home/sharedspam/.spamassassin/auto-whitelist
bayes_file_mode 777
auto_whitelist_file_mode 777
bayes_ignore_header ReSent-Date
bayes_ignore_header ReSent-From
bayes_ignore_header ReSent-Message-ID
bayes_ignore_header ReSent-Subject
bayes_ignore_header ReSent-To
bayes_ignore_header Resent-Date
bayes_ignore_header Resent-From
bayes_ignore_header Resent-Message-ID
bayes_ignore_header Resent-Subject
bayes_ignore_header Resent-To

# Enable Bayes auto-learning
bayes_auto_learn 1
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.
# - english
ok_languages en

# Mail using locales used in these country codes will not be marked
# as being possibly spam in a foreign language.
ok_locales en

report_header 1
use_terse_report 1
defang_mime 0
report_safe 0

######### End Spamassassin Config File

Step 9: Configure Spam and Ham learning

You need to feed your Bayesian filter immediately to get accurate results. In your local mail account make a folder called spam. Then use the script below so that spamassassin can learn about spam the gets through.

touch /etc/cron.weekly/spam-learning
chmod 755 /etc/cron.weekly/spam-learning

Edit this file to contain:

-- Customer e-mail learning in cron.weekly --

sa-learn --dbpath /home/sharedspam/.spamassassin --showdots --mbox
--spam /home/user/Spam

sa-learn --dbpath /home/sharedspam/.spamassassin --showdots --mbox
--ham --local /home/user/Sent

rm /home/user/Spam

touch /home/user/Spam

chmod 775 /home/user/Spam

chown user:user /home/user/Spam

Of course please replace the word: user with your actual username.

You can then execute this script as soon as you get some spam in your spam folder and some ham in your Sent items folder.

Spam Configuration - Part 4 ->

References:

Sample Sendmail configuration file

Spam proof and Virus Filtering e-mail server -
http://www.centos.org/modules/newbb/viewtopic.php?topic_id=4938

Centralized Spam Filtering:
http://www.stearns.org/doc/spamassassin-setup.current.html#sitewide

Spam Assassin Configurator:
http://www.yrex.com/spam/spamconfig.php

Article last reviewed: 12/29/2006

Created by: Digital Foundation, inc.

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