OK, I will check the documentation and try to get up to speed.
One last question regarding the policies...When I create the email domain, I leave the spam filter policy setting there as "-Not Enabled-". Then when I create the email account, I enable the spam filter policy "Normal".
Users have stated that changing from "-Not Enabled-" to "Normal" at the email account level results in no discernable reduction of spam in their Inbox.
Do I have to enable the spam filter policies at both the domain and account levels? What heirarchy applies? What are the rules that apply when spam filter policies are enabled at both levels? Does the more restrictive policy win out? Does the email account policy level always override the domain policy if configured?