Back Up or Copy Your Mac OS X Mail Junk Mail Training Data
Like most modern email clients, Mac Mail includes a junk mail filter that can be trained for more accurate filtering. By clicking on a JUNK or NOT JUNK button the system "learns" what emails to move to your Junk folder, and which ones are legitimate. This is sometimes referred to as separating the SPAM from the HAM.
"Our lives are on our laptops – family photos, medical documents, banking information, details about what websites we visit, and so much more. Thanks to protections enshrined in the U.S. Constitution, the government generally can’t snoop through your laptop for no reason. But those privacy protections don’t safeguard travelers at the U.S. border, where the U.S. government can take an electronic device, search through all the files, and keep it for a while for further scrutiny – without any suspicion of wrongdoing whatsoever."
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