"S/MIME isn't supported in this view. To view this message, select the more options (...) button and then sort by date."
This doesn't seem to be possible, really sad that an email client can't display a message with an S/MIME signature...
I also need the integration to open mails with S/MIME encryption. The normal iOS mail app can do so - why not the app?
This is a killer for me. Like the app overall