Configuring goldfish autoresponder for Postfix
goldfish is a quite simple autoresponder for Postfix in conjunction with MySQL, written in PHP. It consists of only one PHP file which can be started through a cronjob.
In this tutorial, it's assumed that you have already installed Postfix with MySql backend using this tutorial: Installing Postfix with MySql backend and SASL for SMTP authentication
1. Install PHP5-CLI (Command Line Interpreter) if it's not already installed
apt-get install php5-cli
Setup DomainKeys Identified Mail (DKIM) in Postfix
DomainKeys Identified Mail (DKIM) is a method for email authentication that allows an organization to take responsibility for a message it has sent in a way that can be validated by a recipient. The technique is based on public-key cryptography: Responsibility is claimed by the signer by adding a digital signature to a message's header, the DKIM-Signature header field. The verifier recovers the signer's public key using the DNS, and then verifies that the signed parts have not been altered.
1. Install DKIM filter
apt-get install dkim-filter
Implementing SPF checks in Postfix
Sender Policy Framework (SPF), as defined in RFC 4408, is an e-mail validation system designed to prevent e-mail spam by addressing a common vulnerability, source address spoofing. SPF allows administrators to specify which hosts are allowed to send e-mail from a given domain by creating a specific DNS SPF record in the public DNS. Mail exchangers then use the DNS to check that mail from a given domain is being sent by a host sanctioned by that domain's administrators.
Installing EHCP (Easy Hosting Control Panel)
EHCP is a powerful, yet easy to install control panel that allows the user to manage services such as Web, FTP, Database and DNS servers.
The install script handles the installation and configuration of the required services. I recommend starting with a clean Debian system to avoid conflicts.
1. Download required EHCP files
wget http://www.ehcp.net/download
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. Add backports to your apt sources (pico /etc/apt/sources.list)
deb http://www.backports.org/debian lenny-backports main contrib non-free
2. Add the backports keyring and update apt
apt-get update
apt-get install debian-backports-keyring
apt-get update
3. 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 libnet-cidr-perl
Installing Postfix with MySql backend and SASL for SMTP authentication
Postfix is a free and open source mail transfer agent (MTA). It is intended as a fast, easy-to-administer, and secure alternative to the widely-used Sendmail MTA.
Install and configure Postfix
1. Install Postfix and SASL
apt-get install postfix postfix-mysql libsasl2-modules-sql sasl2-bin libsasl2-2 postfix-tls libpam-mysql
> Internet Site
> host.domain.com
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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