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Linux Journal: Anatomy of Postfix

Nov 25, 2006, 21:00 (0 Talkback[s])
(Other stories by Ralf Hildebrandt, Patrick Koetter)

"This chapter describes how Postfix works, what each piece of the system does, and how these components relate to each other. After going through this material, you should have an understanding of Postfix as a whole, so that you can focus on individual goals.

"Postfix consists of a small number of programs that interact with user processes (sendmail, postqueue, postsuper, and so on) and a larger number of programs that run in the background. Only the programs that run in the background are controlled by the master daemon. The master daemon's job is to determine what work there is to do and dispatch the appropriate program to do the work. This modular design allows for a higher level of security because each program runs with the lowest privilege set needed to fulfill its task..."

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