Spam Filtering on the Departmental Mail Server

The departmental mail server runs SpamAssassin to identify spam and procmail to shunt both spam and spam backscatter (i.e. false mail bounces) out of your inbox and into special folders. Our standard configuration also filters out duplicate copies of messages (i.e. messages which have your address in the To: or Cc: lines more than once).

The spam, backscatter and duplicates are saved in these folders, respectively:

mail/rhpcs-mail-cleaner/spam
mail/rhpcs-mail-cleaner/bounce
mail/rhpcs-mail-cleaner/duplicate

These folders are archived and emptied daily, weekly or monthly (depending on your configuration file); see below for details.