set timefmt "%m/%d/%Y %H:%M"
set format x "%m/%d\n%H:%M"
set title "Distribution of message values"
set xlabel "Date mail arrived"
set ylabel "Hit value"
set nolabel
set xdata time
set terminal png small color
set grid
set yrange [-10:55]
set key below reverse Left spacing 2 nobox title 'Legend:'
plot '/home/felicity/cron/tmp/month' using 1:3 title 'Spam scores' with points 3, 5 with lines 7, 7 with lines 5