Hollander,
Something you might want to try with Outlook 2010 is using the Rules Wizard to create a rule that only leaves emails from your Contacts in the Inbox and dumps all the others in the Junk Mail folder.
Of course you need to create and maintain the Contacts. Maybe that would be easier given that you use BCM. I haven't ever tried it.
I have used a program called Outlook Email Address Extractor in the past. It scans through Outlook Inbox items and extracts all the email address together with a count of emails in which each address appeared. I used that as the basis for checking that I had everyone worthwhile in Contacts.
I'm assuming that "Hot Marijke" and her friends aren't using the same sending email address used by your retarded government official correspondents.