Oh boy the battle to get back in control of your mailbox. This is where SpamAssassin comes in. This guide will have you run a simple setup. If that’s not enough there’s also a guide on catching more spam with SpamAssassin.
Right I assume you know that spamassassin is a perl thing. On the other hand I also assume you are running qmail. I know I’m making a lot of assumptions. Even so perl is a requirement but changes are that you already have perl installed. I would highly recommend you to use perl 5.24 the current version shipped with FreeBSD. You can check your perl version like this.
You will get an output with the version number of perl among other things.
This is perl 5, version 24, subversion 1 (v5.24.1) built for amd64-freebsd-thread-multi Copyright 1987-2017, Larry Wall Perl may be copied only under the terms of either the Artistic License or the GNU General Public License, which may be found in the Perl 5 source kit. Complete documentation for Perl, including FAQ lists, should be found on this system using "man perl" or "perldoc perl". If you have access to the Internet, point your browser at http://www.perl.org/, the Perl Home Page.
cd /usr/ports/mail/spamassassin make WITH="RELAY_COUNTRY PYZOR RAZOR" install clean
Don’t check SPF_QUERY as the “Smtp Run File” already has this option built in. For the rest of the popups just accept the default settings. Please be aware that even though there are check boxes at various “applications and options” they will not automatically be activated like “Razor or Relay Country” that are checked. It does however install them and gives you the option to enable them later on using the SpamAssassin configuration files. Right let’s get the configuration files in place and modify them to our needs.
cd /usr/local/etc/mail/spamassassin/ cp local.cf.sample local.cf
Modify the configuration file
We need to edit 1 line and 1 line only don’t edit anything else. “Qmail-Scanner” will do the rewriting of the subject header for us. Trusted networks will bee handled through the “smtp.cdb”. So we need to edit this file /usr/local/etc/mail/spamassassin/local.cf in that file find the following line.
# required_score 5.0 make WITH="RELAY_COUNTRY PYZOR RAZOR" install clean
Remove the # mark and set a score that will mark mails as spam. I have mine set to 3.4 and i have not gotten any false positives yet but still catching tons of spam. Mine looks like this.
Update SA rules
We need to fetch the latest “SA” rules this is a simple one line command. I strongly suggest putting this in cron.
Install extra modules
In order to catch a bit more spam we will install a few extra modules. This is done through cpan. So first start up cpan like this.
Next install the following module.
Once installed exit cpan like this.
Now lets enable IP Country this in done in the file /usr/local/etc/mail/spamassassin/v310.pre find the following line.
# WhitelistSubject - Whitelist/Blacklist certain subject regular expressions # loadplugin Mail::SpamAssassin::Plugin::WhiteListSubject
And below “WhiteListSubject” add the following line like this.
# WhitelistSubject - Whitelist/Blacklist certain subject regular expressions # loadplugin Mail::SpamAssassin::Plugin::WhiteListSubject loadplugin IP::Country::Fast
Now let’s check if the configuration files have any errors.
If this runs without errors we can continue. If there are errors it’s probably just typos. The error message will tell you what to look for.
“Setting up Spamassassin To Be Run By Daemontools”
mkdir -m 1755 /var/qmail/supervise/spamd mkdir -m 755 /var/qmail/supervise/spamd/log cd /var/qmail/supervise/spamd fetch http://www.xfiles.dk/content/files/freebsd-qmail/spamd-run mv spamd-run run chmod 755 run cd log fetch http://www.xfiles.dk/content/files/freebsd-qmail/spamd-log-run mv spamd-log-run run chmod 755 run mkdir /var/log/qmail/spamd
Enable the service.
ln -s /var/qmail/supervise/spamd /service/
And let’s check if things a woring as intended.
svstat /service/spamd/ /service/spamd/log/
You should get an output very much like below.
/service/spamd/: up (pid 667) 1456 seconds /service/spamd/log/: up (pid 675) 1456 seconds
Delete the original startup script that Spamassassin created under the installation so it doesn’t startup twice.
“Adding Spamassassin To Qmailctl”
In order to control spamassassin from qmailctl we need to edit this file /usr/bin/qmailctl find the following lines and remove the # mark.
# if svok /service/spamd ; then # svc -u /service/spamd /service/spamd/log # echo "Starting spamd" # else # echo "spamd supervise not running" # fi # echo " spamd" # svc -d /service/spamd /service/spamd/log # svstat /service/spamd # svstat /service/spamd/log # echo "Pausing spamd" # svc -p /service/spamd # echo "Pausing spamd" # svc -c /service/spamd # echo "* Restarting spamd" # svc -t /service/spamd /service/spamd/log
All of the lines above should now look like this.
if svok /service/spamd ; then svc -u /service/spamd /service/spamd/log echo "Starting spamd" else echo "spamd supervise not running" fi echo " spamd" svc -d /service/spamd /service/spamd/log svstat /service/spamd svstat /service/spamd/log echo "Pausing spamd" svc -p /service/spamd echo "Pausing spamd" svc -c /service/spamd echo "* Restarting spamd" svc -t /service/spamd /service/spamd/log
Now restart qmail in order for the changes to take effect.
In case you need to tweak or catch more spam I’ve written a guide for that [here]
And we are done here.