Table of Contents

3. Mail Server Architecture

3.1. Generic Server Configuration

3.1.1. Running Services

3.1.2. Other Generic Server Parameters

3.1.3. DNR Settings

3.2. Services and Modules

3.2.1. SMTP Receiving

3.2.2. Processing

3.2.3. SMTP Sending

3.2.7. Reporting

3.2.7.1. Reporting Parameters

3.2.10. FTP Backup Service

3.2.11. RPOP Service

3.3. Connectivity and Threading

3.3.1. Listeners

3.4. Clustering Support

3.4.1. Cluster Overview

3.4.1.1. LDAP Introduction

3.4.1.1.1. Basic Directory Setup

3.4.1.1.2. LDAP Entry Structure

3.4.1.1.3. LDAP Authentication

3.4.1.2. AXIGEN Mapping System

3.4.1.3. AXIGEN Authentication System

3.4.1.4. AXIGEN Front-End Services Setup

3.4.1.4.1. The SMTP Proxy

3.4.1.4.2. The IMAP and POP3 Proxies

3.4.1.4.3. The WebMail Proxy

3.4.1.4.4. Mapping Setup

3.4.1.5. AXIGEN Back-End Services Setup

3.4.2. LDAP Routing

3.4.2.1. Configuring Mapping Parameters

3.4.2.2. POP3 Proxy Service

3.4.2.3. IMAP Proxy Service

3.4.2.4. Webmail Proxy Service

3.4.3. AXIGEN LDAP Authentication

3.4.4. Integrating Active Directory into a cluster environment

3.4.5. Exotic Cluster Setups

3.5. Groupware and collaboration

3.5.1. Personal Organizer & AXIGEN Outlook Connector

3.5.2. Folders and permissions

3.4.5. Exotic Cluster Setups

This chapter deals with common setups that are beyond the standard deployment of a clustering environment. Most of the examples here provide some sort of advantage like lower costs in exchange for a drawback such as higher risks and creation of single points of failure.

UPDATE: This section should be updated if other cluster configuration environments are encountered.