Re: Can I block emails based on keywords in the body of the email in the MEG?
yes, you can.
It is possible to create custom Compliance Dictionaries with the desired keywords, and which can be included on the anti-spam filter.
With these dictionaries you may influence the SPAMScore of a certain mail. If you wan to block or discard, add scorepoints and create a spamscore based action that discards or rejects the affected email.