demonstration 1
Enhanced Privacy: Password Locking & Message Expiration
Step 1

Search “Proton Mail Download” in browser
Step 2

Enter the recipient’s email, the subject, and your message. Then, click the Lock icon at the bottom to protect the message with a password
Step 3

create a password to encrypt the messasge , then click set encryption
Step 4

Click the three dots icon and set an 'Expiration time' to have the message automatically deleted from both inboxes after the specified duration
Step 5

Set The date and time and then click set
Step 6

Click Sent at bottom right
Step 7

Once the recipient opens the email, it will look like the image below. Recepient must click 'Unlock message' to view the secure content
Step 8

Enter Password that being set by the sender before can read the message
Step 9

Now Recepient can read the hidden messaage and the message will disapppear after 1 days