If we enable encryption by default when the sender and recipient are within the same organization, will they have to enter their password for every email when viewing emails on their phone or on their home computer?
Yes, but you couldn't with the legacy OME. With the "new" OME feature you can use both mail flow rules and let users manually use those two options. But you should think twice about encrypting all internal emails by default.
@nickcoa Obviously one can do whatever they like, but I would think that sensitive information needs to be encrypted (on top of the already encrypted connections TLS and so on.) and not all emails by default.