#!/bin/sh

count()
{
	x=`find "$MAILDIR"/*/Inbox/new -type f | wc -l`

	case $x in
	0)
		echo 'No New Mail'
		;;
	1)
		echo '1 New Mail'
		cnt='There is 1 new email'
		;;
	*)
		printf '%d New Mails\n' $x
		cnt="There are $x new emails"
		;;
	esac

	[ $x -gt ${prev:=0} ] && notify-send -a email -u normal 'New Email' \
		"A new unread email has been recieved.  $cnt."
	prev=$x
}

count

inotifywait -qm "$MAILDIR"/*/Inbox/new | while read _ event _
do
	case "$event" in
	CREATE|DELETE|MOVED_*)
		count
		;;
	esac
done