Ebook: Linux Email

Set up, maintain, and secure a small office email server. Linux E-mail; Linux E-mail; Credits; About the Authors; About the Reviewers; Preface; What this book covers; Who this book is for; Conventions; Reader feedback; Customer support; Errata; Piracy; Questions; 1. Linux and E-mail Basics; Why manage your own e-mail server; What you need to host an e-mail server; Sizing the hardware of your e-mail server; Main e-mail protocols: SMTP, POP, and IMAP; Overview; POP protocol; IMAP protocol; The SMTP protocol; E-mail and DNS; DNS record types used by e-mail applications; Backup mail servers; Summary; 2. Setting up Postfix; Introduction to Postfix. What is PostfixPostfix architecture: An overview; New message arrival; Scheduling message deliveries; Message delivery; Supporting programs; Installation and basic configuration; Choosing the Postfix version; Installing from a package; Installing from source code; The Postfix configuration; main.cf; master.cf; Lookup tables; Getting Postfix up and running; Domains and hostnames; Indirect mail delivery through your ISP; Choosing network interfaces; Choosing mailbox format for local deliveries; Error reporting; Other useful configuration parameters. Starting Postfix and sending the first messageStopping spam and other unwanted messages; Postfix's anti-spam methods: An overview; Understanding SMTP restrictions; Access maps; Access map examples; Implementing new policies; Using DNS blacklists; Choosing DNS blacklists; Stopping messages based on content; Configuring header and body checks; Header and body checks examples; Caveats; Virtual alias domains and local aliases; Virtual alias domains; Many virtual alias domains mapping to one local domain; One virtual alias domain mapping to many local domains; Group addresses. Introducing MySQL lookupsLocal aliases; Command deliveries; Common pitfalls; Other address rewriting mechanisms; Troubleshooting Postfix problems; Reading and interpreting the log files; Message queue ID; SMTP submission and local delivery; Local submission and SMTP delivery; Connection problems upon SMTP delivery; Getting more detailed log messages; Troubleshooting lookup tables with Postmap; Getting help from the Postfix mailing list; Summary; 3. Incoming Mail with POP and IMAP; Choosing between POP and IMAP; Downloading and installing Courier-IMAP. Installing Courier-IMAP from a distribution repositoryInstalling Courier-IMAP from RPM; Installing Courier-IMAP using the Debian package format; Installing Courier-IMAP from source; Prerequisites; Building the Courier Authentication Library; Configuring the Courier Authentication Library; Resolving errors; Building Courier-IMAP; Handling errors; Using POP3; Configuring Courier-IMAP for POP3; Testing the POP3 Service; Retrieving E-mail via POP3 with Windows Live Mail; Using IMAP; Configuring Courier for IMAP; Testing the IMAP service; Retrieving mail via IMAP with Mozilla Thunderbird; Summary