Encrypt as of certain date for S/MIME - disable

[rrrooommmaaa]

If possible, implement encryptMsgAsOfDateIfSomeAreExpiredAndUserConfirmedModal with subsequent sending for S/MIME keys as well.
If not possible, expired S/MIME certificate should make the recipient NO_PGP probably?

[tomholub]

I would not want to support this on S/MIME (in fact, I may want to eventually drop support for this for OpenPGP too since it's not spec compliant).

Expired OpenPGP cert, as well as expired S/MIME cert, should be met with a prompt for the sender to get a newer versions of the keys from the recipient, who likely has them available.

[rrrooommmaaa]

So we need to define the color (and prompt) for such recipients. Should it be the same color as OpenPGP's (expired but possible to send)?

[tomholub]

The color would be orange, like openPGP. But not allowed to send for S/MIME.

How about: The S/MIME certificate of the following recipient is expired: xxx@example.com. Please ask them to provide an updated S/MIME certificate, or an OpenPGP public key.

[tomholub]

To nudge them to prefer OpenPGP. In case :-)