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This article describes how to block spoofed "From" names when the email address isn't from your own domain.
In this example, mail from Joe Smith is "spoofed" so that in Outlook his name is displayed as the sender. This is done to fool Tracy into purchasing something and sending it to the scammer. But when checking the actual From address, it is a valid external address.
From: Joe Smith <mgt001@GiveMeMoney.com>To: Tracy Barker <Tracy.Barker@ValidCompany.com>
This rule will quarantine any email coming in with the display name Joe Smith if it is not also from the domain validcompany.com