Kapitel 5 „Anatomy of Postfix“ aus „The Book of Postfix: State-of-the-Art Message Transport“ von Ralf Hildebrandt und Patrick Koetter hat dankenswerterweise das Linux Journal in der aktuellen Ausgabe online.

Developed with security and speed in mind, Postfix has become a popular alternative to Sendmail. The Book of Postfix published by No Starch Press is a complete guide to Postfix whether used by the home user, as a mailrelay or virus scanning gateway, or as a company mailserver. Practical examples show how to deal with daily challenges like protecting mail users from SPAM and viruses, managing multiple domains, and offering roaming access. The following is chapter 5 from „The Book of Postfix“.

Kapitel 5 stellt die Arbeitsweise von Postfix vor und wie die diversen Komponenten zusammenarbeiten. Das englischsprachige Standardwerk ist auch bei Amazon erhältlich: The Book of Postfix. State-of-the-Art Message Transport

• Hildebrandt, R., & Koetter, P.. (2005). The Book of Postfix. State-of-the-Art Message Transport No Starch-Press.
  [Bibtex]

  @BOOK{hil05,
  title = {The Book of Postfix. State-of-the-Art Message Transport},
  publisher = {No Starch-Press},
  year = {2005},
  author = {Ralf Hildebrandt and Patrick Koetter}
  }