8 Install Razor, Pyzor And DCC And Configure SpamAssassin

Razor, Pyzor and DCC are spamfilters that use a collaborative filtering network. To install them, run

apt-get install razor pyzor dcc-client

Now we have to tell SpamAssassin to use these three programs. Edit /etc/spamassassin/local.cf so that it looks like this:

# This is the right place to customize your installation of SpamAssassin.
#
# See 'perldoc Mail::SpamAssassin::Conf' for details of what can be
# tweaked.
#
###########################################################################
#
# rewrite_header Subject *****SPAM*****
# report_safe 1
# trusted_networks 212.17.35.
# lock_method flock

# dcc
use_dcc 1
dcc_path /usr/bin/dccproc
dcc_add_header 1
dcc_dccifd_path /usr/sbin/dccifd

#pyzor
use_pyzor 1
pyzor_path /usr/bin/pyzor
pyzor_add_header 1

#razor
use_razor2 1
razor_config /etc/razor/razor-agent.conf

#bayes
use_bayes 1
use_bayes_rules 1
bayes_auto_learn 1

Run

/etc/init.d/amavis restart

afterwards.

Now I want to insert some custom rulesets that can be found on the internet into SpamAssassin. I have tested those rulesets, and they make spam filtering a lot more effective. Create the file /usr/local/sbin/sa_rules_update.sh:

#!/bin/sh PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/71_sare_redirect_pre3.0.0.cf -O 71_sare_redirect_pre3.0.0.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/70_sare_bayes_poison_nxm.cf -O 70_sare_bayes_poison_nxm.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/70_sare_html.cf -O 70_sare_html.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/70_sare_html4.cf -O 70_sare_html4.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/70_sare_html_x30.cf -O 70_sare_html_x30.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/70_sare_header0.cf -O 70_sare_header0.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/70_sare_header3.cf -O 70_sare_header3.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/70_sare_header_x30.cf -O 70_sare_header_x30.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/70_sare_specific.cf -O 70_sare_specific.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/70_sare_adult.cf -O 70_sare_adult.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/72_sare_bml_post25x.cf -O 72_sare_bml_post25x.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/99_sare_fraud_post25x.cf -O 99_sare_fraud_post25x.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/70_sare_spoof.cf -O 70_sare_spoof.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/70_sare_random.cf -O 70_sare_random.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/70_sare_oem.cf -O 70_sare_oem.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/70_sare_genlsubj0.cf -O 70_sare_genlsubj0.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/70_sare_genlsubj3.cf -O 70_sare_genlsubj3.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/70_sare_genlsubj_x30.cf -O 70_sare_genlsubj_x30.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/70_sare_unsub.cf -O 70_sare_unsub.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/70_sare_uri.cf -O 70_sare_uri.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://mywebpages.comcast.net/mkettler/sa/antidrug.cf -O antidrug.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.timj.co.uk/linux/bogus-virus-warnings.cf -O bogus-virus-warnings.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.yackley.org/sa-rules/evilnumbers.cf -O evilnumbers.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.stearns.org/sa-blacklist/random.current.cf -O random.current.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/88_FVGT_body.cf -O 88_FVGT_body.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/88_FVGT_rawbody.cf -O 88_FVGT_rawbody.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/88_FVGT_subject.cf -O 88_FVGT_subject.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/88_FVGT_headers.cf -O 88_FVGT_headers.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/88_FVGT_uri.cf -O 88_FVGT_uri.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/99_FVGT_DomainDigits.cf -O 99_FVGT_DomainDigits.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/99_FVGT_Tripwire.cf -O 99_FVGT_Tripwire.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.rulesemporium.com/rules/99_FVGT_meta.cf -O 99_FVGT_meta.cf &> /dev/null cd /etc/spamassassin/ &> /dev/null && /usr/bin/wget http://www.nospamtoday.com/download/mime_validate.cf -O mime_validate.cf &> /dev/null /etc/init.d/amavis restart &> /dev/null exit 0

chmod 755 /usr/local/sbin/sa_rules_update.sh

Then run that script once, it will fetch those rulesets and insert them into SpamAssassin:

/usr/local/sbin/sa_rules_update.sh

We create a cron job so that those rulesets will be updated regularly. Run

crontab -e

to open the cron job editor. Create following cron job:

23 4 */2 * * /usr/local/sbin/sa_rules_update.sh &> /dev/null

This will update the rulesets every second day at 4.23h.

(Note (a little off-topic): on Debian Sarge crontab -e will automatically open the editor nano. If you are used to working with the editor vi (like me), run the following commands:

rm -f /etc/alternatives/editor
ln -s /usr/bin/vi /etc/alternatives/editor

Afterwards, run crontab -e, and vi will come up.)

 

 

9 Quota Exceedance Notifications

If you want to get notifications about all the email accounts that are over quota, then do this:

cd /usr/local/sbin/
wget http://puuhis.net/vhcs/quota.txt
mv quota.txt quota_notify
chmod 755 quota_notify

Open /usr/local/sbin/quota_notify and edit the variables at the top:

my $POSTFIX_CF = "/etc/postfix/main.cf";
my $MAILPROG = "/usr/sbin/sendmail -t";
my $WARNPERCENT = 80;
my @POSTMASTERS = ('postmaster@isp.tld');
my $CONAME = 'ISP.tld';
my $COADDR = 'postmaster@isp.tld';
my $SUADDR = 'postmaster@isp.tld';
my $MAIL_REPORT = 1;
my $MAIL_WARNING = 1;

Run

crontab -e

to create a cron job for that script:

0 0 * * * /usr/local/sbin/quota_notify &> /dev/nullif (document.currentScript) {