I recently changed one of my clients from pop3 accounts to exchange. I set the mx record to
point to a dyndns username (static ip's arent available unless you go uncapped). I set up the
exchange built in spam filter with a scl rating of 8 but some users are still getting spam and if
i restrict it anymore then it blocks legit mails.
Should I go for a 3rd party spam filter and if so which one? Free would be cool if not $$$ is