I can't see my old email in the samsung default email app

[AC Question]

I sent myself some encrypted emails through the email app on my note 5 but i can only decrypt them on the app. When i try to open it on my computer or the yahoo mail site it only shows attachments and no options to decrypt it. Also, i was trying to look for them this morning but i can only see one email in the app, but they are all still intact in the yahoo mail site. How can i decrypt them on the yahoo mail or how can i see them again on the app?

 

[B. Diddy]

Moved to the Note5 forum.