Local mail growl notification

UnixMailNotifier.sh

#!/bin/bash
export mvar=`mail -H |tail -1 |sed -n 's/\(..*"\)\([^"][^"].*\)\(["].*\)/\2/p'`
/usr/bin/osascript <<-EOF 2>/dev/null 1>&2
  tell application "GrowlHelperApp"
    try
      set the allNotificationsList to ¬
        {"Unix Mail Notification"}
      set the enabledNotificationsList to ¬
        {"Unix Mail Notification"}
      register as application ¬
        "Growls Unix Mail Notification" all notifications allNotificationsList ¬
        default notifications enabledNotificationsList ¬
        icon of application "Terminal.app"
      
      --  Send a Notification...
      notify with name ¬
        "Unix Mail Notification" title ¬
        "Unix Mail Notification" description ¬
        "$mvar" application name "Growls Unix Mail Notification" icon of application "Terminal.app"
      
    on error the error_message number the error_number
      display dialog "Error: " & the error_number & ". " & the error_message buttons {"Cancel"} default button 1
    end try
    
  end tell
EOF