ASA Version 8.3(3)? Or were they actually using the IOS Firewall on a router instead of a firewall? PIX and ASA appliances used to ship with "ESMTP inspection

ASA Version 8.3(3)? Or were they actually using the IOS Firewall on a router instead of a firewall? PIX and ASA appliances used to ship with "ESMTP inspection" enabled by default -- which would strip out the "STARTTLS" advertisement (replacing it with "X"s) from a server's response.