Organization of this document

Spam Filtering for Mail Exchangers:
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11. Organization of this document

This document is organized into the following chapters:

Background: General introduction to SMTP time filtering, and to SMTP.
Techniques: Various ways to block junk mail in an SMTP transaction.
Considerations: Issues that pertain to transaction time filtering.
Questions & Answers: My attempt at anticipating your questions, and then answering them.

A sample Exim implementation is provided in Appendix A.

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