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Search results for Spam filtering with Pyzor and SpamBayes

Debian

Spam filtering with Pyzor and SpamBayes

Post date: January 3, 2006, 04:01 Category: Security Views: 2865 Comments
Tutorial quote: Spam appears to be a fact of life for most of the online world at the moment. Here is how I personally handle the filtering of incoming mail, using a combination of Pyzor, SpamBayes and Procmail. These tools each integrate nicely, and work easily with my mail reader of choice: mutt.
Ubuntu

Postfix Spam Filter using Ubuntu Dapper, MailScanner and ClamAV(beta)

Post date: July 16, 2006, 16:07 Category: Network Views: 6009 Comments
Tutorial quote: This is a similar version of the HOWTO that can be found here: http://www200.pair.com/mecham/spam/spamfilter20050628.html. Except for using Ubuntu Server instead of Debian and MailScanner instead of Amavisd, the Postfix, Rayzor, Pyzor, DCC and ClamAV sections are almost the same.
Debian

How to filter spam with Spamassassin and Postfix in Debian

Post date: April 20, 2008, 18:04 Category: Network Views: 3477 Comments
Tutorial quote: We have already discussed how to install mail server with postfix+Devcot+SASL +Squirrel Mail in this article we will see how to add spam filter for postfix mail server.Apache SpamAssassin is an extensible email filter that is used to identify spam. Once identified, the mail can then be optionally tagged as spam for later filtering. It provides a command line tool to perform filtering, a client-server system to filter large volumes of mail, and Mail::SpamAssassin, a set of Perl modules allowing Apache
SpamAssassin to be used in a wide variety of email systems.

Debian

Filtering PDF-/XLS-/Image-Spam With ClamAV (And ISPConfig) On Debian/Ubuntu

Post date: July 24, 2007, 02:07 Category: Security Views: 3315 Comments
Tutorial quote: There is currently a lot of spam where the spam information is attached as .pdf or .xls files, sometime also hidden inside a .zip file. While these spam mails are not easy to catch with e.g. SpamAssassin or a Bayes filter, the ClamAV virus scanner can catch them easily when it is fed with the correct signatures as ClamAV is built to scan mail attachments.
Linux

Tuneups and Tweaks for the Better Spam-Trap

Post date: April 14, 2005, 13:04 Category: Network Views: 2596 Comments
Tutorial quote: In parts 1 and 2 of our thrilling "Building an Anti-Virus/Anti-Spam Gateway" series, we covered the basic steps for setting up SpamAssassin and Clam Anti-virus with Postfix. This installment is devoted to testing and tweaking, and creating whitelists in Amavisd-new. Whitelists are essential when you set up any kind of spam filtering: It's the best way to make sure your wanted mail gets through.
Unix+clones

Optimizing DSPAM + MySQL 4.1

Post date: April 2, 2006, 22:04 Category: Optimizing Views: 3855 Comments
Tutorial quote: DSPAM is a scalable and open-source content-based spam filter designed for multi-user enterprise systems. It's great at filtering out spam but on busy mailservers the pruning of the MySQL databases takes way too long time ...
Debian

HELO restrictions for Exim4

Post date: June 16, 2006, 22:06 Category: Security Views: 2799 Comments
Tutorial quote: One thing that I've noticed on my mailserver in recent months has been a large number of spam mails which identify themselves as being sent from my own IP address. Since they never are blocking them is a useful thing to do before any more intensive filtering is done.
Untangle

Spam Blocking And Web Filtering With The Untangle 5.3 Network Gateway

Post date: September 4, 2008, 10:09 Category: Security Views: 7457 Comments
Tutorial quote: Untangle bundles common open-source applications for blocking spam, spyware, viruses, adware and unwanted content on the network in one single Linux distribution. It can be integrated into existing networks either as a router or as a transparent bridge (directly behind the router, but before the switch that connects the client PCs with the router). The best thing about Untangle is that you do not have to reconfigure the client PCs - Untangle works out of the box.
Linux

How To Block Spam Before It Enters The Server (Postfix)

Post date: June 4, 2007, 23:06 Category: Security Views: 4286 Comments
Tutorial quote: The last few weeks have seen a dramatic increase in spam (once again). Estimates say that spam makes now up for 80 - 90% of all emails, and many mail servers have difficulties in managing the additional load caused by the latest spam, and spam filters such as SpamAssassin do not recognize large parts of that spam as they did before. Fortunately, we can block a big amount of that spam at the MTA level, for example by using blacklists, running tests on the sender and recipient domains, etc. An additional benefit of doing this is that it lowers the load on the mail servers because the (resource-hungry) spamfilters have to look at less emails.
Unix+clones

SpamAssassin, ClamAV and Procmail Howto

Post date: April 16, 2005, 00:04 Category: Network Views: 2990 Comments
Tutorial quote: This document describes how to install SpamAssassin (for filtering SPAM) and ClamAV (for filtering viruses, trojans, worms, etc.) and how to invoke them by using procmail recipes. It is suitable for scenarios where Sendmail or Postfix deliver emails to local users. It should work (maybe with slight changes concerning paths etc.) on all *nix operating systems. I tested it on Debian Woody so far.

In the end you will have a system where Sendmail or Postfix deliver emails to a local user; the emails are passed to procmail which invokes SpamAssassin and ClamAV in order to filter the emails before they arrive in the user's inbox. However, the installation of Sendmail and Postfix are not covered in this document.

This howto is meant as a practical guide.
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