users getting infected with spyware
hey ppl, we did a scan on a few systems using Spyware Dr. on a few of our users and they are getting infected with 'Application.TrackingCookies' and 'Adware.Advertising'. These users were getting 'Undeliverable' emails and were send hundreds of emails to different accounts causing our mail server/domain to be blacklisted with Yahoo.com, Verizon.net & Aol.com. We've since then disabled those accounts and reinstated our whitelist status. Just wanted to know what everyone out there uses to prevent these infections...software/hardware/scripts?