| If you had a list of the words used to describe sendmail,
they'd probably include reliable, flexible, configurable,
complex, monolithic, and daunting. But you're not likely to
find the word easy. Even seasoned sendmail pros are
sometimes frustrated by the intricacies of sendmail's
configuration files. With a little determination and the
help of a good reference book, like sendmail, Third Edition,
you can master this demanding program. But when there's a
significant point release, like sendmail V8.13, where do you
turn?
An excellent companion to our popular sendmail, Third
Edition, the sendmail 8.13 Companion provides a timely way
to document the improvements in V8.13 in parallel with its
release. The book highlights the important changes in the
latest update to sendmail, pointing out not just what is
handy or nice to have, but what's critical in getting the
best behavior from sendmail. This is especially important
now that spam is on the rise, and because mobile technology
requires roving laptops to use encrypted connections.
Not surprisingly, many of the changes and additions to V8.13
have been driven by the ongoing fight against spam. Anyone
concerned about spam--and who isn't?--will benefit greatly
by upgrading to V8.13 sendmail. Among its many enhancements,
V8.13 includes new routines that support the SPF sending
site authentication standard (in the Milter library),
simultaneous connection control, high connection rate
control, and finer tuning of SASL parameters. The additions
to the Milter library, alone, make upgrading worthwhile, but
sendmail's connection control makes it a no-brainer. The key
to understanding them is the sendmail 8.13 Companion.
The book is divided into twenty-five chapters that parallel
the chapters in the third edition of the sendmail book. For
instance, if you're interested in Options configuration
(Chapter 24 in sendmail), you'll turn to Chapter 24 in your
companion volume to find out what's new in V8.13.
For a simple dot release (8.12 to 8.13), V8.13 sendmail has
added more features, options, and fundamental changes than
any other single dot release has included. If you need to
set up or manage sendmail, you'll want this companion volume
close at hand. Even if you aren't ready to upgrade to V8.13,
you'll find the key to understanding them is the sendmail
8.13 Companion a useful guide to understanding and staying
current with the latest changes in sendmail.
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Biting the hand that feeds IT 
Published by: O'REILLY & ASSOCIATES