Recently I migrated some services to another server and I did not want to use the particular IP to send emails out. As I already have an Office Microsoft 365 tenant I thought I could use Exchange Online as a relay. A first thought was to get one more Exchange Online Plan 1 license and …
S/MIME is used to encrypt and/or sign email sent to another recipient. It uses a combination of a private and a public key. On Exchange, the public keys can be published to the Global Address List (GAL). If you have a Hybrid environment for Exchange or you are using just Exchange Online managing the certificates …