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What?

Nightly MassCheck runs are currently the primary vehicle for evaluating the quality of rules checked into SpamAssassin. Every night contributors check out a specific revision of SpamAssassin from SVN and run MassCheck on their corpora. They upload their MassCheck logs to an rsync server, where lots of analysis takes place, visible through the RuleQaApp.the way people submit data on the effectiveness of current rules on their recent spam and ham. It is used to generate the very rule scores that determine the effectiveness of SpamAssassin (distributed via sa-update), and to evaluate rules via the RuleQaApp. The accuracy of SpamAssassin is directly related to the number of people contributing to nightly MassChecks.

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Broken link:
(There's also an older, clunkier version of the analysis scripts running on DanielQuinlan's server; see http://www.pathname.com/~corpus .)
There are three ways to do this; using a script we distribute, doing it yourself, or just uploading your corpus to our server. */

How? (The Easiest Way)

If you rsync up your corpus to our server, as described in UploadedCorpora, it can be mass-checked there. Unfortunately you have to share your mail corpus with whoever might have access to that machine. It's not expected that anyone will ever actually look, but it's there nonetheless. If you are very concerned about privacy, you may be advised to strip out the more private mails before uploading, or mass-check on your own machine instead. (This is what I do --jm)

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