We want to exchange encrypted mail with a customer on another Lotus Notes domain. After reading many articles, it seems that we cannot exchange encrypted mail between domains when we use SMTP because Notes needs an X.509 certificate. Having a restricted copy of the NAB from this domain is not a viable solution, so can you tell me if the following solution can address this problem?
We can define the two domains as CA authority, generate an X.509 certificate for each users wanting to exchange mail and show these users how to exchange certificates for encrypting the mail. Will this work or do you have another suggestion?
Yes, this will work. However, they could encrypt with Notes IDs if the users exchange public keys.