Procmail

Procmail is a filtering program that processes your email, e.g. it can feed it to SpamAssassin or move it to the appropriate folders. It should be invoked automatically when mail arrives. Procmail can be configured via /etc/procmailrc.

Procmail statements fall in one of two categories:
 * assignments like LOGNAME=/var/log/procmail
 * rules for filtering

Test your procmail
To see if your procmail works, try the following: echo "This will be in your mailbox" | procmail Then look if the text is in your mailbox, e.g.: cat /var/spool/mail/root or if you use MailDirs to store your mails: cat ~/Maildir/new/* By this command, you should also be able to verify if your procmail calls SpamAssassin: X-Spam-Checker-Version: SpamAssassin 3.1.4 (2006-07-25) on scorpio.site X-Spam-Level: *** X-Spam-Status: No, score=3.2 required=5.0 tests=EMPTY_MESSAGE,MISSING_HEADERS, MISSING_SUBJECT,NO_RECEIVED,NO_RELAYS,TO_CC_NONE autolearn=no version=3.1.4 This will be in your mailbox

Examples
The following can go into /etc/procmailrc LOGNAME=/var/log/procmail DROPPRIVS=yes DEFAULT=$HOME/Maildir/ MAILDIR=$HOME/Maildir/ :0fw | /usr/bin/spamc :0: * ^X-Spam-Level: \*\*\* .Trash/ :0: * ^X-Spam-Status: Yes .Trash/ Moves all your spam to the .Trash folder must be a Maildir, procmail does not support /var/mail/USERNAME
 * 1) Forward mail to spamassassin
 * 1) Move mail marked as spam to a Spam mailbox

Configure your procmail
Best, configure your procmail with webmin that has a module for doing that.