HowtoForge - Linux Howtos and Tutorials - Postfix

Postfix Virtual Hosting With LDAP Backend With Dovecot As IMAP/POP3 Server On Ubuntu Hardy Heron 8.04 TLS

Wed, 30 Jul 2008 18:17:49 +0200

Postfix Virtual Hosting With LDAP Backend With Dovecot As IMAP/POP3 Server On Ubuntu Hardy Heron 8.04 TLS

I've been running with a MySQL backend for virtual hosting for some time, but when I discovered Phamm and the added FTP feature (amongst others) I decided to switch to LDAP as backend for Postfix with virtual hosting. In view of the fact that the installation and configuration guide of Phamm is lacking some basic information it took me quite some time (including crying, swearing, getting depressed, ...) to put it all together and get it working. Long live google to find hints or explanations for problems and configuration issues. Piecing it all together wasn't simple so I would like to share how I configured it and got it all working toghether (as I like), but I think that it will benefit other users as well.

A Simple Mailserver On Arch Linux (Postfix + Dovecot)

Thu, 24 Jul 2008 15:10:49 +0200

A Simple Mailserver On Arch Linux (Postfix + Dovecot)

This tutorial describes how to install a complete mailserver using Postfix and Dovecot on an Arch Linux machine or VPS. This specific tutorial is based on my 256MB VPS. Basic linux knowledge is required as I'm not describing every step in detail.

How To Configure ISP Mail Server With Virtual Users/Domains On Centos 5.0 Using Postfix, Dovecot, MySQL, phpMyAdmin, TLS/SSL

Mon, 14 Jul 2008 16:49:35 +0200

How To Configure ISP Mail Server With Virtual Users/Domains On Centos 5.0 Using Postfix, Dovecot, MySQL, phpMyAdmin, TLS/SSL

This howto will explain how to go about setting up an email server on Centos 5 using Postfix, Dovecot, RoundCube, Virtual Users/Domain and phpAdmin. I have also done a similar setup on Fedora Core 6. My best advice is to set this up first on a workstation and test it thoroughly before setting up on a server and going live with it!

How To Whitelist Hosts/IP Addresses In Postfix

Tue, 10 Jun 2008 12:07:05 +0200

How To Whitelist Hosts/IP Addresses In Postfix

If you are administrating a mail server and use blacklists to block spam, you probably know this problem: from time to time your customers complain that they cannot receive emails from certain freemailers. Most often this happens because a freemailer was abused to send out spam and therefore got blacklisted. This short guide shows how you can whitelist such a mail server in Postfix to make your customers happy again.

Virtual Users And Domains With Postfix, Courier, MySQL And SquirrelMail (Ubuntu 8.04 LTS)

Tue, 20 May 2008 18:13:58 +0200

Virtual Users And Domains With Postfix, Courier, MySQL And SquirrelMail (Ubuntu 8.04 LTS)

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. The resulting Postfix server is capable of SMTP-AUTH and TLS and quota (quota is not built into Postfix by default, I'll show how to patch your Postfix appropriately). Passwords are stored in encrypted form in the database (most documents I found were dealing with plain text passwords which is a security risk). In addition to that, this tutorial covers the installation of Amavisd, SpamAssassin and ClamAV so that emails will be scanned for spam and viruses. I will also show how to install SquirrelMail as a webmail interface so that users can read and send emails and change their passwords.

The Perfect SpamSnake - Ubuntu 8.04 LTS

Thu, 01 May 2008 18:45:36 +0200

The Perfect SpamSnake - Ubuntu 8.04 LTS

This tutorial shows how to set up an Ubuntu Hardy Heron (8.04 LTS) based server as a spamfilter in Gateway mode. In the end, you will have a SpamSnake Gateway which will relay clean emails to your MTA. You will also be able to view your incoming queue, train your SpamSnake and carry out a few more advanced operations via MailWatch.

Virtual Users And Domains With Postfix, Courier, MySQL And SquirrelMail (Mandriva 2008.1)

Sun, 13 Apr 2008 19:35:31 +0200

Virtual Users And Domains With Postfix, Courier, MySQL And SquirrelMail (Mandriva 2008.1)

This document describes how to install a Postfix mail server that is based on virtual users and domains, i.e. users and domains that are in a MySQL database. I will also demonstrate the installation and configuration of Courier (Courier-POP3, Courier-IMAP), so that Courier can authenticate against the same MySQL database Postfix uses. In addition to that, this tutorial covers the installation of Amavisd, SpamAssassin and ClamAV so that emails will be scanned for spam and viruses. I will also show how to install SquirrelMail as a webmail interface so that users can read and send emails and change their passwords.

Zimbra Collaboration Suite Open Source Edition On CentOS

Tue, 11 Mar 2008 17:37:22 +0100

Zimbra Collaboration Suite Open Source Edition On CentOS

This tutorial shows how to set up Zimbra Collaboration Suite - Open Source Edition on CentOS. This tutorial covers installation of CentOS, dependencies for ZCS and setup of Split DNS when working behind a firewall. This tutorial is based on the way I set this server up and is only a suggestion. It carries no guarantees and it is highly suggested that you do this on a test server first to verify functionality. If you don't have a test server available you should download VMWare Server 1.0 and perform this tutorial on a test virtual server.

Virtual Users And Domains With Postfix, MailScanner, Mailwatch & MySQL On CentOS 5.1

Thu, 06 Mar 2008 17:59:58 +0100

Virtual Users And Domains With Postfix, MailScanner, Mailwatch & MySQL On CentOS 5.1

This document describes how to customize Falko's "Virtual Users And Domains" - setup for CentOS 5.1 so that it works with MailScanner and Mailwatch. The resulting system provides a web interface (Mailwatch) where you can manage quarantined emails, train SpamAssassin, edit the white- and blacklist, view configuration files and the detailed MySQL database status ...

How To Configure Custom Postfix Bounce Messages

Wed, 05 Mar 2008 17:36:33 +0100

How To Configure Custom Postfix Bounce Messages

Since Postfix version 2.3, Postfix supports custom bounce messages. This guide shows how to configure custom Postfix bounce messages.

Virtual Hosting Howto With Virtualmin On CentOS 5.1

Sun, 02 Mar 2008 18:34:44 +0100

Virtual Hosting Howto With Virtualmin On CentOS 5.1

This tutorial shows how to set up a CentOS 5.x server to offer all services needed by virtual web hosters. These include web hosting, smtp server with (SMTP-AUTH and TLS, SPF, DKIM, Domainkeys), DNS, FTP, MySQL, POP3/IMAP, Firewall, Webalizer for stats.

Automatically Add Disclaimers To Outgoing Emails With alterMIME On Fedora 8

Fri, 22 Feb 2008 17:16:44 +0100

Automatically Add Disclaimers To Outgoing Emails With alterMIME On Fedora 8

This document describes how to install and configure alterMIME as a Postfix filter on a Fedora 8 system. The resulting system will automatically add disclaimers to outgoing emails.

How To Implement Domainkeys In Postfix Using dk-milter

Fri, 01 Feb 2008 16:53:59 +0100

How To Implement Domainkeys In Postfix Using dk-milter

Domainkeys is "DomainKeys is a method of e-mail authentication. Unlike some other methods, it offers almost end-to-end integrity from a signing to a verifying Mail Transfer Agent (MTA). In most cases the signing MTA acts on behalf of the sender, and the verifying MTA on behalf of the receiver. DomainKeys is specified in Historic RFC 4870, which is obsoleted by Standards Track RFC 4871, DomainKeys Identified Mail (DKIM) Signatures." according to the wikipedia. So why a how to on it when there is DKIM ? Well domainkeys is still actively being used and is more widely deployed than DKIM, the developer Yahoo still uses it to sign and verify mail although they are contributers to the DKIM standard.

Set Up Postfix DKIM With dkim-milter

Wed, 30 Jan 2008 17:18:02 +0100

Set Up Postfix DKIM With dkim-milter

DKIM is an authentication framework which stores public-keys in DNS and digitally signs emails on a domain basis. It was created as a result of merging Yahoo's domainkeys and Cisco's Identified Internet mail specification. It is defined in RFC 4871.

How To Delete Mails From Or To A Specific Email Address From Your Mail Queue (Postfix)

Tue, 15 Jan 2008 12:04:33 +0100

How To Delete Mails From Or To A Specific Email Address From Your Mail Queue (Postfix)

If you get hit by a spam attack that floods your server with hundreds/thousands of emails from the same sender email address or to the same recipient email address, you can clean your mail queue from these emails with one single command before the mail flood takes your server to its knees.