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More often than not, the words "sendmail configuration" strike dread in the hearts of sendmail and system administrators--and not without reason. sendmail configuration languages are as complex as any other programming languages, but used much more infrequently--only when sendmail is installed or configured. The average system administrator doesn't get enough practice to truly master this inscrutable technology.Fortunately, there's help. The sendmail Cookbook provides step-by-step solutions for the administrator who needs to solve configuration problems fast. Say you need to configure sendmail to relay mail for your clients without creating an open relay that will be abused by spammers. A recipe in the Cookbook shows you how to do just that...

If you want to speed up the development of your .NET applications, you're ready for C# design patterns -- elegant, accepted and proven ways to tackle common programming problems. This practical guide offers you a clear introduction to the classic object-oriented design patterns, and explains how to use the latest features of C# 3.0 to code them.C# Design Patterns draws on new C# 3.0 language and .NET 3.5 framework features to implement the 23 foundational patterns known to working developers. You get plenty of case studies that reveal how each pattern is used in practice, and an insightful comparison of patterns and where they would be best used or combined. This well-organized and illustrated book includes:An explanation of design patterns and why t...

O'Reilly's XML CD Bookshelf provides convenient online access to seven indispensable XML books-XML in a Nutshell, Second Edition, XSLT, XML Schema, SAX2, Java & XML, Second Edition, Java and XSLT, and Perl & XML -all from your CD-ROM drive. The CD has a master index for all seven books and a powerful search engine-and all the text is extensively hyper-linked-so you can find what you're looking for quickly. Packaged with the hard copy of XML in a Nutshell, Second Edition, it takes up less than 2 inches of bookshelf space, and when you're on the run, you can just grab the CD and go. They say good things come in small packages. The XML CD Bookshelf packs a stack of essential XML books into one comprehensive, immensely convenient, and portable ...

If you need to create or use formal descriptions of XML vocabularies, the W3C's XML Schema offers a powerful set of tools for defining acceptable document structures and content. An alternative to DTDs as the way to describe and validate data in an XML environment, XML Schema enables developers to create precise descriptions with a richer set of datatypes?such as booleans, numbers, currencies, dates and times?that are essential for today?s applications.Schemas are powerful, but that power comes with substantial complexity. This concise book explains the ins and outs of XML Schema, including design choices, best practices, and limitations. Particularly valuable are discussions of how the type structures fit with existing database and object-oriented p...