The Book of Postfix

danny writes "Do you run a mail server using Postfix? If so, then you should check out the latest addition to my book reviews, a look at Hildebrandt and Koetter's Book of Postfix." Read on for the review. The Book of Postfix author Ralf Hildebrandt + Patrick Koetter pages 464 publisher No Starch Press rating 9 reviewer Danny Yee ISBN 1593270011 summary understanding and implementing Postfix mail systems

When The Book of Postfix arrived, I jumped straight to the chapter "Understanding SMTP Authentication", since that was something I wanted to get working. This explains the problem -- how to allow travelling users with unknown IP addresses to send mail through a mail server without opening it up to spammers -- and clearly lays out the options: SMTP-after-POP or -IMAP, SMTP authentication, certificate-based relaying using TLS, or some kind of VPN. "If you want something simple, independent, and secure, SMTP AUTH is probably for you."

The remainder of the chapter explains how to set up a backend for SMTP authentication -- a choice between saslauthd and other options -- and the following chapter then explains how to configure Postfix to use it. This approach is typical of The Book of Postfix, which tackles many topics with paired chapters, the first covering background, theory and any ancillary systems and the second covering the actual Postifx configuration. It also emphasises progressive implementation accompanied by testing, which is most reassuring when modifying production servers.

Other chapters in Part III, "Advanced Configurations", cover running Postfix chrooted, using TLS (two chapters), mail gateways and multiple domains. There's also a chapter that works through building a complete mail system for an organisation. Part IV covers tuning and the appendices cover installing Postfix (for Debian or Redhat Linux, or from source) and troubleshooting.

Moving backwards, the hundred and twenty pages in part II cover content controls. Some basic postmaster background is followed by pairs of chapters on each of message transfer restrictions, built-in content filters, and external content filters. I've been working through these, improving my anti-spam controls, and they're proving really helpful; my next step will be implementing amavisd-new.

Part I explains how to set up a host to run Postfix, with ancillary services such as DNS, NTP and syslog, then how to set up a simple single domain configuration, either on a permanently connected machine or on a dialup machine. It then gives a brief description of Postfix's basic anatomy. Part I is concise -- just fifty pages -- but it offers everything most people will need for a basic setup.

There's no cruft in The Book of Postfix: it's a fairly chunky book, but none of it is padding. Excerpts from configuration files include just the right amount of context and the diagrams (and a very few screenshots) are integrated with the text and tightly focused. Given the scope, it's probably overkill for basic Postfix users, though the first fifty pages would make an excellent "getting started" guide for them.

There are some omissions. There's no general explanation of how the master.cf file works, for example, or of rewriting -- neither "masquerading" nor "canonical" appear in the index or glossary. The "Anatomy of Postfix" chapter could definitely have been more comprehensive.

How does The Book of Postfix compare with the O'Reilly book Postfix: the Definitive Guide ? The Book of Postfix is nearly twice the length and provides much more detailed step-by-step explanations and more on ancillary systems -- it explains how to set up backends for SMTP authentication, for example, rather than just telling you that you need one.

I highly recommend The Book of Postfix to anyone using Postfix and wanting to do more than the basics with it.

Danny Yee has written over 800 other book reviews. You can purchase The Book of Postfix from bn.com. Slashdot welcomes readers' book reviews -- to see your own review here, read the book review guidelines, then visit the submission page.

Comments

Missing: advantages of postfix

[powdered toast dude]

I'd consider buying a book about postfix if it clearly and objectively outlined the advantages that postfix offers over other MTAs such as exim and qmail. This book doesn't sound like it offers that kind of information for the potential postfix noob.

I've run heavy-load MTAs under qmail for some time now, and since djb won't bring it in to the current century, integrating all of the new features necessary for today's SMTP world becomes more and more hacky and patchy. Thankfully, gentoo eases it for me by including all of the most useful patches in its qmail ebuild, but some features remain unintegrated or can't easily be done early in the SMTP conversation.

I'd love to see a simple, objective, and comprehensive comparison made between postfix, exim, and qmail (include sendmail if you like, although I won't use sendmail for admittedly emotional and historic reasons).

Once you've made the commitment to go postfix, though, this review makes it sounds like this book might be a good resource.

$0.02,
ptd

over 800 book reviews?

[jspectre]

ok. but can someone please explain to me how someone has all the time to read over 800 books, in-depth, and write a decent review on them all? even at it for a full-time job. hmm...