The Internet Message Access Protocol (IMAP) allows clients to access their email on a remote server, whether from the office, a mobile phone, or a hotel room in Outer Mongolia. IMAP is powerful and flexible, but it’s also complicated; it’s more difficult to implement than POP3 and more error-prone for both client and server.
The Book of IMAP offers a detailed introduction to IMAP and POP3, the two protocols that govern all modern mail servers and clients. Readers learn how the protocols work as well as how to install, configure, and maintain the two most popular open source mail systems, Courier and Cyrus.
Authors Peer Heinlein and Peer Hartleben have set up hundreds of mail servers and offer practical hints about troubleshooting errors, migration, filesystem tuning, cluster setups, and password security that will help readers extricate themselves from all sorts of tricky situations. Readers also learn how to:
- Use built-in tools for server analysis, maintenance, and repairs.
- Manage shared folders, virtual domains, and user quotas.
- Authenticate user data.
- Handle heavy traffic with load balancers and proxies.
- Implement complementary webmail clients.
- Set up and use the Sieve email filter.