S/MIME Sign box checked by detault
Our client is requiring that all outgoing emails be digitally signed. We already have certificates in place for our OSC mailxboes, but I don't want our agents to have to check the Sign box each time they send an email.
Is anyone aware of a solution for having the Sign box checked by default or for the signature to be added automatically through some other means? I'm hoping there is an add-on for the admin layer, rather than having to send the emails through an API.
I found this post from 2 years ago with a similar requirement, without a response: