FreeBSD Install FuzzyOCR To Detect Image Spam

How do I install FuzzyOcr plugin for SpamAssassin to detect unsolicited bulk mail (Spam) containing images as the main content for Postfix mail server?

FuzzyOcr uses different methods to analyzes the content and properties of images to distinguish between normal mails (Ham) and spam mails. FuzzyOcr can detect many types of image spam and can protect your server and users from spammers easily.

How do Install FuzzyOCR on FreeBSD?

First, update ports tree, enter:
# portsnap fetch update
Now, install FuzzyOCR, type:
# cd /usr/ports/mail/p5-FuzzyOcr-devel
# make install clean

Copy FuzzyOcr config and words files to SpamAssassin configuration directory, type:
# cp /usr/local/share/examples/FuzzyOcr/FuzzyOcr.* /usr/local/etc/mail/spamassassin
Open /usr/local/etc/mail/spamassassin/init.pre file, enter:
# vi /usr/local/etc/mail/spamassassin/init.pre
Add following line to enable FuzzyOcr, enter:

# FuzzyOcr
loadplugin Mail::SpamAssassin::Plugin::FuzzyOcr

Open /usr/local/etc/mail/spamassassin/FuzzyOcr.cf, enter:
# vi /usr/local/etc/mail/spamassassin/FuzzyOcr.cf
Make sure you set focr_logfile to /var/log/FuzzyOcr.log, enter:
focr_logfile /var/log/FuzzyOcr.log
Save and close the file. Restart your anti spam gateway engine such as mailscanner:
# /usr/local/etc/rc.d/mailscanner restart
NOTE: If you are not using mailscanner, restart sa-spamd:
# /usr/local/etc/rc.d/sa-spamd restart

How do I test if FuzzyOCR is working or not?

Simply download test sample spam email images from the official website. Or try following commands:
# cd /tmp
# mkdir test;cd test
# fetch http://users.own-hero.net/~decoder/fuzzyocr/sample-mails.tar.gz
# tar -zxvf sample-mails.tar.gz
# spamassassin -t < ocr-gif.eml

You can also see log in /var/log/maillog and /var/log/FuzzyOcr.log files:
# tail -f /var/log/FuzzyOcr.log
# tail -f /var/log/maillog

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Posted by: SXI ADMIN

The author is the creator of SXI LLC and a seasoned sysadmin, DevOps engineer, and a trainer for the Linux operating system/Unix shell scripting. Get the latest tutorials on SysAdmin, Linux/Unix and open source topics via RSS/XML feed or weekly email newsletter.