#!/usr/bin/zsh

new="$(find $HOME/.mail/*/inbox/new/ -type f | wc -l)"
old="$(find $HOME/.mail/*/inbox/cur/ -type f | wc -l)"

if [ $new -gt 0 ]
then
  export DISPLAY=:0; export XAUTHORITY=~/.Xauthority;
  notify-send "You've got mail."
fi