S/MIME Certificate Selection

Hello jtjbt20x,

For help with enabling the encryption, test the steps below found in the article here: Use S/MIME to send and receive encrypted messages in the Mail app in iOS - Apple Support

"Enable message encryption

When you configure S/MIME for your account, you can choose to "Encrypt by Default" when you compose new messages:

1. Open the Settings app.
2. Choose Mail > Accounts.
3. Select the account that has messages that you want to encrypt by default.
4. Choose Account > Advanced > Encrypt by Default, then turn on Encrypt by Default.

When you reply to or forward a message, the encryption state of your message matches the state of the incoming message rather than your system default setting. You can also use the blue Lock button in the address field to change the encryption state of an outgoing message."

You can find additional information in the "Trust a recipient's signature manually" section of the same article.

Cheers.

jtjbt20x,

Thanks for letting us know you cleared things up! Take care.