Who is frequently using gmail can
1.schedule Send as per ur choice
2. Can set confidential mode where you can set expiry of ur mail according to your choice and also set passcode which need other to open your email.
For these settings
Whenever you go to compose any email before that click on 3 dot
1. Click on schedule and set the time of your priorities and choice
Again go to
2. Confidential
Set expiry time from drop dwon
And set passcode .
Hope this will informative for all of you.
