I think you have to do:
dig mx domain.com
That should list your mx records.
You have to postmap your relay_recipients file and that will fix the relay error.
For the bayes issues, make sure you have the following in your spam.assassin.prefs.conf file and make sure to change the values to match your setup:
#Bayes DB Connection
Home of the SpamSnake
Last edited by Rocky; 15th September 2008 at 16:17.