Spoof

If your'e getting mail from outside sources pretending to be on your domain, you can create a Mail Flow Rule to manage messages that say they are from your domain but really aren't. Log into the ECP and go to Mail Flow > Rules and New (+) Click "more options..." You want to add two applications. Apply this rule if: The sender domain is 'yourdomain.com' The sender location is from outside of the company You can treat mail that triggers those two applications any way … [Read more...] about Anti Spoofing for Domains in Exchange 2016