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These are used to upload logs for the release rescoring run as described in RescoreMassCheck.Send mail to
<submit.at.spamassassin.org>, and ask for a log-submission account if you haven't already got one. One of the devs will generate an account and password and send it back via emailhttp://svn.apache.org/repos/asf/spamassassin/trunk/masses/CORPUS_SUBMIT has information about how to request an account and get setup.
You also need a copy of the rsync tool. Most Linux distributions include this. Alternatively, pick it up at http://www.rsync.org/ .