My company has been using Email Security (now at version 7.3, the last) since the early days of it being Surf Control. Lately though, it seems that the amount of spam leaking through the cracks is increasing a significant amount, despite the server's update schedule running regularly.
I understand that this product is no longer getting version upgrades, but my question is: Is there any reason that it should be becoming less effective as time wears on, despite definition updates? What can I point to to try and figure out how to get a better detection rate without cranking up the false positives?
Is there any reason that the Email Security Gateway or other Websense products would do a better job of filtering our corporate mail compared to our Email Security 7.3 with all the latest definitions, and if so, how significant would you say that change would be?