Whitelisting should process before Blacklisting in Sophos Central Email filtering
It is possible to create overlapping rules in white and blacklisting. If whitelisting is processed before blacklisting AND the processing stops on a match we can use the following mechanism:
This way everyone from @contoso will be blacklisted EXCEPT that one user.
Right now it blocks everything from @contoso (so the blacklist) regardless of the whitelisting.