Rsync Accounts
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 email.
You also need a copy of the rsync tool. Most Linux distributions include this. Alternatively, pick it up at http://www.rsync.org/ .