Try the spambot module. It checks email addresses against known stammers.
Ken Sent from my Verizon Wireless BlackBerry
-----Original Message----- From: Wayne Johnson wdtj@yahoo.com Sender: support-bounces@drupal.org Date: Tue, 30 Oct 2012 08:57:36 To: support@drupal.orgsupport@drupal.org Reply-To: support@drupal.org, Wayne Johnson wdtj@yahoo.com Subject: [support] Spammers