I've been researching setting up TLS on Exchange 2007. I've read some posts in regards to the setup and it doesn't seem too complex. My understanding is Exchange 2007 is set for opportunistic TLS by default. However, we have one client that wants the TLS forced, rather than reverting to plain text (we're only receiving, not sending). My concern is if I do this on the current smtp receiver connector, this will implement across the board and bounce back any emails sent without TLS and obviously cause major issues. My question is do I need to setup a new IP and smtp receiver connector exclusively for enforcing TLS? Thank you in advance for the help.