Add field/setting to filters so the following rule could be run on the server:

IF senderFriendlyName IS IN Users.FullName AND SenderAddress DOES NOT CONTAIN domain.com, perform action.

Example: email appears to be from me, but is actually from someone faking my name, I can flag it as spam:

==============
From: Jeff Cooper <evilhacker<_at_>gmail.com>
To: End User <enduser<_at_>mydomain.com>
SUBJECT: Important Task
MESSAGE: Please click this link to send gift cards to an important client!
==============

Most end-users do not bother checking the address of the sender, only react (clicking a bad link or something) when they recognize the name.

Thanks,

Jeff