Mail notification with procmail and libnotify.

notify.sh

#!/bin/bash
# popup a small notification with 'notify-send'
dis=`formail -X From: -X Subject:`
from=`echo "$dis" | formail -X From:`
sub=`echo "$dis" | formail -X Subject:`

# tweaks < > are special
from=${from//</\(}
from=${from//>/\)}
from=${from//&/\.}
sub=${sub//</\(}
sub=${sub//>/\)}
sub=${sub//&/\.}

sub=${sub:0:75}
from=${from:0:75}
TM=2000

pids=`pgrep -u alex gnome-panel`
for pid in $pids; do
    # find DBUS session bus for this session
    DBUS_SESSION_BUS_ADDRESS=`grep -z DBUS_SESSION_BUS_ADDRESS \
        /proc/$pid/environ | sed -e 's/DBUS_SESSION_BUS_ADDRESS=//'`
    # use it
    DBUS_SESSION_BUS_ADDRESS=$DBUS_SESSION_BUS_ADDRESS \
     /usr/bin/notify-send -u normal -t $TM "$sub" "$from"
done