As an administrator, you can set up rules to determine whether messages containing certain words, such as obscenities, are rejected, quarantined, or delivered with modifications.
You use the Objectionable content setting to create word lists for filtering for objectionable content, and to specify what action to perform for messages with this content.
- See Google's resource to Set up rules for objectionable content
- See CDW Education's word list resource: Objectionable content / Content Compliance Resource Sheet - (contains bad language)