The book of Postfix
Ralf Hildebrandt, Patrick Koetter · 2005
From the Publisher: The Book of Postfix explains in detail how to set up Postfix (a UNIX email server) for three uses: home office use, as a mail relay/virus wall, or as a company mail server. Practical and comprehensive, the book shows how to deal with everyday challenges like protecting mail users from spam and viruses, providing multiple domains, and offering roaming access.