Email security certificates (digital IDs) are required for sending encrypted email. Each security certificate will be associated with an email address. Below are some services we are aware of that issue email security certificates. Click a link to visit each website:
Self-signed certificates: You can also create a self-signed certificate, but these are unlikely to be automatically trusted or discovered by a third party. This means both parties must manually add the certificate to their internal list of trusted certificates. See your Windows documentation for instructions.
Certificates do expire and need to be renewed. A typical certificate life is 18 months, but can be increased to as much as 10 years or more, though security risk is increased.
Once you have obtained an email security certificate, Install Public and Private Keys on a Workstation. For Direct Messaging, public keys also need to be installed on a hosting server. See Email Certificate Hosting.