Any expert out there to explain why Microsoft came up with Exchange Front/Back end servers.?
I believe even without Exchange Front end , mobile users still can use OWA to access their mailboxes.
Is it a factor of security? most of the envuronments don't put the FE in the DMZ, they just put it in the same LAN as the Back end.
Do internet emails like Yahoo, Hotmail go through FE to get the message to exchange server?