Since updating to version 8.6 build 6257 I have noticed that all emails sent to an address associated with an account are automatically rerouting to the user email.   IE If I have user1@abc.com and user1@def.com as separate servers (for organization reasons) they all go to user1@abc.com and never even go to the downstream def.com server.  This is not how it behaved previosly - how can I restore previous behavior?

Thanks!