We have setup an Exchange 2010 Hub server receive connector to allow other network device to send email (EMC>server conf>hub transport>Hub server>create new receive connector). In the network tag, I add IPs which the HUB server will receive mails from remote servers (or network device).
We have been asked to add a lot of network device which need to send emails to the this hub server.
Question, in the Exchange 2010 world, in order to allow a remote device to send email, do I need to setup whitelist like the above or can I just specify a domain login credential on the network device? Or do I need both to be setup?