I have a client on my server running joomla 1.0 and a spammer has exploited the php mail script. I have notified the client to upgrade as the instance * Version 1.0.15 :: /home/voltage/public_html/web/CHANGELOG.php is outdated.
The client is slow to react, is there anything than can be done to disable the ability to send mail from the site until he can upgrade or move it?