A News-to-Mail Gateway
The last code example of this chapter is a custom news-to-mail gateway. It periodically scans Netnews for articles of interest, bundles them into a MIME message, and mails them via Internet mail. Each time the script is run it keeps track of the messages it has previously sent and only sends messages that haven't been seen before.
You control the script's scope by specifying a list of newsgroups and, optionally, one or more patterns to search for in the subject lines of the articles contained in the newsgroups. If you don't specify any subject-line patterns, the script fetches the entire contents of the listed newsgroups.
The subject-line patterns take advantage of Perl's pattern-matching engine, and can be any regular ...
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