I need to establish forced TLS mail (Outbound) to sepcified domain(Partner Company).
ExchangeMBX2013- CAS ---- >SMTP relay---->Mail Security system-----> external---->Specifed domain.
Mail security system have to receive forced TLS from SMTP relayed and then deliver the TLS mail to external.
I think belows action plan will be required, any other options to do for achievement?
- Public CA for TLS install on Exchange server
- Forced TLS setup in SMTP relayed server for the domain