If your users use IMAP it might be easier to have them copy their mails to a special folder (either a private one or a shared one) and have spamassassin regularly learn all mails in this folder(s).
I'm interested in this approach. What is the best way to go about it? A cron to process the mail? How do you clear out the mail that has been learned? how do you ensure that the spam-learn has access to the folder in the user's IMAP store?
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Though it's cold and lonely in the deep dark night I can see paradise by the dashboard light.
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