The book also provides lots of new material that doesn't get much coverage elsewhere - STARTTLS and AUTH are given entire chapters, and LDAP is covered in recipes throughout the book. But most of all, this book is about saving time - something that most system administrators have in short supply. Pick up the sendmail Cookbook and say good-bye to sendmail dread.
Buy sendmail Cookbook by Craig Hunt from Australia's Online Independent Bookstore, BooksDirect.