To the point, useful and mostly complete
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This is a complete, clear and useful cookbook. No-nonsense, but easy reading.
If you have already set up a sendmail server but somehow know that what you have done can or may or should be done better, then buy this book, and you will have taken a step towards enlightenment and a better system administration.
The introduction states that this is not a book to be read from cover to cover. Let me disagree: that is exactly what I did when receiving it (and I must say I just could not stop) and, yes, I do not remember each recipe, but I do have got a clear scent of sendmail's flavour (and power) and now that I have somewhere to come to whenever a sendmail problem arises.
Problems stated are realistic (take a look at the Contents and you will percive this), solutions are stated in a clear, complete and straightforward language and discussions are part of the beauty of the book.
Security is explained in detail as well, even to the point of describing how to generate the certificates, how and where to store them, etc... (which you may know but is a plus).
A great *cookbook*: do not expect to find any "nuts and bolts" of sendmail's configuration parameters or dirty hacks to strange problems. It gives solutions to practical problems; it does not deal with a specific software's configuration or administration.
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