Can I block people whose email addresses don't match their name?
I get about 20 emails a week from people whose names I know but these aren't coming from them. The real email address these fake emails are coming from changes nearly every other day as well as the domain so I can't block domains as those change and sometimes are from legit domains.
I know their real addresses so I'd like to make a rule of some kind. For example I know John Doe and I know his email address is firstname.lastname@example.org I'd like to block any emails coming from John Doe that aren't originating from email@example.com so if I get a email from firstname.lastname@example.org and I look at the originating email address and it is email@example.com or firstname.lastname@example.org - I want it blocked.
I'm using exchange 2013 on Windows 2012 with SMSE 7 I have the antispam enabled. My firewall is blocking emails on the spamhaus list and other known spam offenders.