I have a client with 10 users and alot more email adresses. They run on SBS 2003 R2 with Exchange SP 2 installed.
We need to find a good Antispam software to install on the SBS server. It shouldnt take tons of resources and dont have to be advanced, like management for multiple Exchange servers and so on. Just as good as possible Antispam detection and a good software in general.
The last years i have been using an online service for antispam, which has resulted in me not using any software on the physical server for antispam, so thats why i could need some professional advice :)