As long as they dont FORCE all email to go through a spam filter, then thats fine.
Spam filtering is never 100% accurate, and some valid emails would be lost. So as long as they give the customer the choice to have their email go thru it or not, i agree there should be the option. (Some of us prefer our own spam filters - customised to suit ourselves
)
But then again, with the email servers already falling over almost every day, i dont think their servers would be able to handle another task!