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Killing That Spam With Postgrey And Postfix

Killing That Spam With Postgrey And Postfix

Ever heard of stopping spam with greylisting?

This tutorial will show you how to setup greylisting with Postgrey and Postfix on Debian. Greylisting will not replace spam filtering software like SA but it will serve as a powerful first hurdle for spam thus reducing the ammount of spam entering the system at all.

Mandriva 2005 Postfix Anti-Spam, Anti-Virus Relay Server for Exchange Server 2000/2003

Mandriva 2005 Postfix Anti-Spam, Anti-Virus Relay Server for Exchange Server 2000/2003

There are a couple of linux how-tos floating on the Internet that deal with this very subject. As a matter of fact, those guides are what inspired to write this one. In the spirit of keeping it simple, let me recommend the Mandrake or as it’s currently known Mandriva Linux distro. This guide has been written with this distro in mind.

How To Automate Spamcop Submissions

How To Automate Spamcop Submissions

Spamcop is a service which provides RBLs for mailservers in order to reject incoming mail from spammers.

Their philosophy is to process possible spam complaints from users. When they receive a certain amount of complaints during a time-period then they will blacklist the offender. This system is dependant on spam reporting from users. However, their submission process is not very user-friendly [...]

Add Mailfiltering to the Falko howto Postfix Guide

Add Mailfiltering to the Falko howto Postfix Guide 

In this guide, you will learn how to get around some of the security policies that Postfix affords in favour of quickness and speed.

The Falko guide shows us how to get Virtual users working with Postfix/ Courier IMAP however it would be nice to offer per user mail filtering on email marked as spam by Spam Assasin for example to go into a SPAM folder for example.

Optimizing DSPAM + MySQL 4.1

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. This small tutorial/hack can speed up the pruning of old data considerably.

Virtual Users And Domains With Postfix, Courier And MySQL (+ SMTP-AUTH, Quota, SpamAssassin, ClamAV)

Virtual Users And Domains With Postfix, Courier And MySQL (+ SMTP-AUTH, Quota, SpamAssassin, ClamAV)

This document describes how to install a mail server based on Postfix that is based on virtual users and domains, i.e. users and domains that are in a MySQL database. I'll also demonstrate the installation and configuration of Courier (Courier-POP3, Courier-IMAP), so that Courier can authenticate against the same MySQL database Postfix uses.

Virtual Hosting with Postfix, part two

Version 1.0

Author: Joe Topjian <joe [at] adminspotting [dot] net>
Last edited 04/15/2005

This article will pick up where the last one left off: how to actually retrieve the email we're storing in our virtual accounts. In the first article, I explained how we're using the third type of Postfix virtual hosting which is to use separate domains and non-unix accounts. The separate domains portion was covered fairly well. Now it's time to work on the non-unix accounts.

How To Build A Spam Filtering Mail Gateway

How To Build A Spam Filtering Mail Gateway

By Brian Goldberg - {brian AT carbonite D0T com}

www.carbonite.com

Spam has evolved from a nusance to a threat. SysAdms need a strategy for combating spam. You can use filtering software loaded on all your users computers, but that takes a lot of time to install and maitenance can be real drag on your time and resources. A better way is to use a centralised device which filters your spam before it enters your enterprise. This "Anti-Spam Gateway" is a lot easier to manage and maintain than individually installed client software. Additionally, it can be tuned to be a lot more effective.

Jari's Procmail Tips Page

This is a Procmail Tips page: a collection of procmail recipes, instructions, howtos. The document also contains URL pointers to the procmail mailing list and sites that fight against Internet UBE. Procmail is powerful mail handling tool and a lot of space here has been devoted to discuss about UBE (aka Spam) and its essence. You will also find many other interesting subjects that discuss about internet mail in general: mail headers, MIME and RFCs. Another part of this document is dedicated to Emacs and Emacs plug-in package Gnus.el, simply because Emacs is the best tool you can use to deal with your mail and news reading. Nowadays Emacs is also available in Windows platform as well. This is not to say that existing Unix elm(1), mutt(1) or pine(1), slrn(1) mail/news programs are bad, they are just limited in power compared to Emacs and usually tied to Unix platform. Finally, to your blessing or curse (smile) the author happens to know Emacs quite well. The tips are compiled from the procmail discussion list, from comp.mail.misc and from the author's own experiences with procmail.

Virtual Hosting with Postfix, part one

Version 1.0

Author: Joe Topjian <joe [at] adminspotting [dot] net>
Last edited 04/11/2005

The virtual domain support in Postfix is actually quite robust. There are three different ways you host virtual domains with Postfix and they're all described here. We'll be looking at the third one: separate domains and non-unix accounts.

Why this one? Because in the end, this options gives us the most flexibility. It's a little more complicated to set up and understand but well worth it when you're hosting several domains.

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