I have two Exchange 2013 servers but want one to be strictly standby and DAG member. Right now mail is flowing into the second "standby" server and then moves along to the primary server where the mailbox resides. I want to stop this behavior since there are no mailboxes on the standby server and it is eventually going to move to offsite location. Can I just disable the receive connectors on the standby server? If yes, will doing so have any adverse effects on mail flow since the server has been part of the mail flow for some time now?