# Sample .procmailrc

PATH=$HOME/bin:/usr/bin:/bin:/usr/local/bin
MAILDIR=$HOME/.nospam
LOGFILE=$MAILDIR/procmail.log
ME=user@myisp.net
LOGABSTRACT=yes
INCLUDERC=procvars

# Anything with my X-Loop: in it has been here already -
# deliver locally before we end up in a loop.
:0
* $^X-Loop: $ME
{
        # Add a descriptive header
        :0 wfh
        | formail -A "X-Diagnostic: Mail loop detected"

        :0
        $DEFAULT
}

# Insert my X-Loop: and a Message-ID if necessary to help eliminate looping
oldshellmetas="$SHELLMETAS" SHELLMETAS  # Save a shell, procmail can do this by itself.
:0 Wfh
| formail -b -aMessage-ID: -A"X-Loop: $ME"
SHELLMETAS="$oldshellmetas" oldshellmetas

# Eliminate duplicate deliveries of messages
:0 Wh :msgid.lock
| formail -D 10000 msgid.cache

# Include spam check based on spamdunk (http://www.interlog.com/~waltdnes/spamdunk/spamdunk.htm)
# provided the mail isn't one of our mailing lists.
:0
*$! $MYLISTS
{ INCLUDERC=spamcheckrc }