http://netvouz.com/falko/tag/spam?feed=rss falko's bookmarks tagged "spam" on Netvouz http://www.howtoforge.com/adding-and-updating-spamassassin-rulesets-with-rulesdujour This article explains how you can download additional SpamAssassin rulesets resp. automatically update these rulesets with a shell script called RulesDuJour. These additional rulesets can increase your spam recognition rate dramatically. Most of the rulesets that RulesDuJour supports can be found on the SA Rules Emporium web site. falko Mon, 26 Nov 2007 11:02:14 GMT http://www.howtoforge.com/assp_clamav_postfix_debian_etch This document describes how to integrate ASSP (Anti-Spam SMTP Proxy) with embedded ClamAV into a mail server based on Postfix featuring virtual users and domains, i.e. users and domains that are in a MySQL database. falko Thu, 06 Sep 2007 11:58:03 GMT http://www.howtoforge.com/etch_postfix_dspam_clamav This article describes how to integrate DSPAM with embedded ClamAV into a mail server based on Postfix featuring virtual users and domains, i.e. users and domains that are in a MySQL database. DSPAM is a scalable and open-source content-based spam filter. The setup shown here is suitable for Debian Etch servers. falko Thu, 16 Aug 2007 10:21:20 GMT http://www.howtoforge.com/popfile_ubuntu_feisty This article shows how you can install and use POPFile to classify incoming emails on an Ubuntu Feisty Fawn desktop. It is a POP3 proxy that fetches your mails from your mail server, classifies them and passes them on to your email client. Of course, POPFile must be trained to properly classify emails. falko Tue, 31 Jul 2007 16:49:28 GMT http://www.howtoforge.com/fight-image-spam-with-fuzzyocr-and-spamassassin-on-debian-lenny This tutorial describes how to scan emails for image spam with FuzzyOCR on a Debian Lenny server. FuzzyOCR is a plugin for SpamAssassin which is aimed at unsolicited bulk mail containing images as the main content carrier. Using different methods, it analyzes the content and properties of images to distinguish between normal mails (ham) and spam mails. FuzzyOCR tries to keep the system load low by scanning only mails that have not already been categorized as spam by SpamAssassin, thus avoiding unnecessary work. falko Thu, 29 Apr 2010 14:32:10 GMT http://www.howtoforge.com/ispconfig_sanesecurity_clamav_debian_ubuntu 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. falko Wed, 25 Jul 2007 13:18:02 GMT http://www.howtoforge.com/how_to_avoid_being_blacklisted A blacklist usually refers to a list of email or IP addresses known to send spam emails or some other type of unsolicited messages. Such lists are currently used by mail servers for filtering incoming emails and blocking the ones listed, in order to improve mail security and integrity. The blacklist is also the opposite of what is called a whitelist. falko Fri, 06 Jul 2007 15:00:49 GMT http://www.howtoforge.com/block_spam_at_mta_level_postfix 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. falko Wed, 06 Jun 2007 09:59:29 GMT http://www.howtoforge.com/block-spammers-hackers-with-mod_defensible-on-apache2-debian-etch mod_defensible is an Apache 2.x module intended to block spammers/hackers/script kiddies using DNSBL servers. It will look at the client IP and check it in one or several DNSBL servers and return a 403 Forbidden page to the client. This guide shows how to install and use it with Apache 2 on a Debian Etch server. falko Tue, 08 Jul 2008 09:16:48 GMT http://www.howtoforge.com/installing-assp-anti-spam-smtp-proxy-on-ubuntu-server-10.04-debian-5.0 This How-To document guides you through installing ASSP (Anti-Spam SMTP Proxy) on an Ubuntu 10.04 (LTS) Server or Debian 5.0 in the simplest way possible. It *may* work on later versions but I have no way of knowing how these instructions will work for you. Installing Ubuntu/Debian is beyond the scope of this document and it is assumed you already have the core Ubuntu/Debian OS with no predefined software collections installed. falko Tue, 15 Mar 2011 12:42:26 GMT