There are a debate that for the business hosting, the clients should install client side spam control on their desktops instead of using the server side spam control.
The reasons:
1) The server side spam control doesn't work well. If it is set up too strict, it may block off some important business emails. If it is set up too lose, it will not block most of the spam anyway.
2) If the server side spam control doesn't block any spam, just mark it as possible spam, it could be done easily with client side spam control software too.
3) The business client should have the client side spam control software on anyway with or without server side spam control, so if they have the client side spam control, the server side spam control doesn't help too much.
Any advices?
Thanks!