Hildebrandt, R., & Koetter, P. (2005). The book of Postfix: State-of-the-art message transport. No Starch Press.
Chicago Style (17th ed.) CitationHildebrandt, Ralf, and Patrick Koetter. The Book of Postfix: State-of-the-art Message Transport. San Francisco: No Starch Press, 2005.
MLA (8th ed.) CitationHildebrandt, Ralf, and Patrick Koetter. The Book of Postfix: State-of-the-art Message Transport. No Starch Press, 2005.
Warning: These citations may not always be 100% accurate.