Installing and configuring MailScanner for virus and spam filtering (Postfix, ClamAV, SpamAssassin, Razor)
MailScanner is an e-mail security and anti-spam package for e-mail gateway systems. MailScanner is highly configurable using a very easy-to-use system of rulesets. Virtually every configuration option can, for example, be controlled on a per-user, per-domain or per-IP basis.
It's assumed that you have already installed and configured Postfix according to this tutorial:
Installing Postfix with MySql backend and SASL for SMTP authentication
1. Install required packages (ClamAV, SpamAssassin, Razor and required libs for MailScanner)
apt-get install clamav clamav-base clamav-freshclam libclamav6 spamassassin razor unzip libarchive-zip-perl libconvert-tnef-perl libhtml-parser-perl libmime-tools-perl libmime-perl libcompress-zlib-perl libconvert-binhex-perl libdbd-sqlite3-perl libfilesys-df-perl libsys-syslog-perl libsys-hostname-long-perl libmailtools-perl libole-storage-lite-perl
Installing Dovecot IMAP and POP daemon with MySql backend
Dovecot is an open source IMAP and POP3 server for Linux/UNIX-like systems, written primarily with security in mind. Dovecot primarily aims to be a lightweight, fast and easy to set up open source mailserver.
It's assumed that you have already installed and configured Postfix according to this tutorial:
Installing Postfix with MySql backend and SASL for SMTP authentication
1. Install required packages
apt-get install dovecot-imapd dovecot-pop3d
Installing the DSPAM web frontend on lenny
This tutorial covers installing and configuring the DSPAM web frontend. Using the web frontend, the mail users can configure the sensitivity of the spam filter, see statistics and more.
I assume you already have the Apache2 web server and DSPAM daemon installed.
1. Install the dspam-webfrontend package and suexec module for the Apache2 web server.
apt-get install dspam-webfrontend apache2-suexec
Installing DSPAM with ClamAV for Postfix on lenny
DSPAM is a scalable and open-source content-based spam filter designed for multi-user enterprise systems. On a properly configured system, many users experience results between 99.5% - 99.95%, or one error for every 200 to 2000 messages.
Install and configure the DSPAM daemon
1. Install DSPAM daemon with MySql storage driver and ClamAV. The installer will create a database and required table structure.
apt-get install DSPAM libdspam7-drv-mysql clamav
> Yes
> Type the password for the root user in MySql
> Select a strong password or allow a random password to be generated
Installing Courier POP3 and IMAP services with MySql backend
This tutorial assumes you already have Postfix installed with MySql backend as described in this tutorial: Installing Postfix with MySql backend and TLS
1. Install required packages
apt-get install courier-authdaemon courier-authlib-mysql courier-pop courier-pop-ssl courier-imap courier-imap-ssl
Installing Postfix with MySql backend and TLS
In this tutorial we'll install a ready to use Postfix mail server with MySql backend for virtual users. Notice that this tutorial only covers installing the SMTP server (not POP3 and IMAP). Click here for a tutorial on installing Courier POP3 and IMAp services.
Once installed and configured, you can easily create your own admin system to modifiy the domains and users because the table structure is very simple.
This tutorial has been tested on Debian etch and lenny
1. Install the Postfix mail server, MySql server and other required packages
apt-get install postfix postfix-mysql sasl2-bin libsasl2-modules mysql-client mysql-server libpam-mysql
Enable greylisting in Postfix using Postgrey
Greylisting is a new weapon to use against spam in this great war being waged upon it. With this new shielding method, by which you may block out huge amounts of spam, you are sure to please your email clients!
In name, as well as operation, greylisting is related to whitelisting and blacklisting. What happen is that each time a given mailbox receives an email from an unknown contact (ip), that mail is rejected with a "try again later"-message (This happens at the SMTP layer and is transparent to the end user). This, in the short run, means that all mail gets delayed at least until the sender tries again - but this is where spam loses out! Most spam is not sent out using RFC compliant MTAs; the spamming software will not try again later.
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