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Sun™ ONE Messaging Server: Practices and Techniques for Enterprise Customers by Dave Pickens

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Chapter 3. Messaging Architectures

This chapter describes the architectures of some of the more common configurations and explains that there are almost infinite combinations. It outlines the pros and cons of each architecture to provide you with information to determine which architectures meet your enterprise messaging requirements. Chapter 10, “Security,” on page 153,” addresses security in detail, but a secure architecture is discussed in this chapter to indicate the use of firewalls in multiple layers, that is, a demilitarized zone (DMZ) as not all messaging systems actually are behind firewalls.

This chapter covers the following topics:

  • Directory

  • MTA

  • Mailstore

  • Proxy Servers

  • Simple Single-Layer Architecture

  • Simple—Alternative Architecture

  • Typical ...

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