Domainbased Encryption using S/MINE with EXO

Hi Everybody,

I'm looking for a solution for this usecase:

• An organisation uses EXO and sends outgoing Emails to a variety of customars.
• Outgoing Emails should be encrypted by S/MIME
• A separate S/MIME certificate sholud be used for each receipent domain/customar

As far as i see, the standard solution with S/MIME and transport rules in Purview only offers a user-based solution with unique certificates for each user.

Any ideas how to solve my usecase?

Thanks for every post!