Exchange 2013. Forward unknown recipients to another smtp server
Posted on 2013-12-06
We have email users on two sites (same email domain) and are migrating to Exchange from Altn MDaemon. Currently the main site MDaemon receives external mail and forwards to the remote MDaemon (it knows who is a user at the remote site) or main site Exchange for anyone else. All main site users are now using Exchange so I wish to turn off the main site MDaemon, as it is not required, and have main site Excahgne receive external mail.
How do I configure Exchange to forward unknown users to the remote site MDaemon?
Is it possible to configure a list of accepted users to forward (the are only twelve users in the remote office) and treat the remainder as SPAM?
This will only be a temporary arrangement until the remote office is moved to Exchange.