Gmail's upcoming self-destructing emails will require the recipients to click on a link and log in with their #Google accounts to see the content, if they are accessing via IMAP/SMTP.
Don't be fooled: Google's purpose is not to give us more confidentiality. They want all of their users to access their mailboxes via the Gmail app or their web interface, so they are creating a burden to the recipients and calling it βsecurityβ to convince people to adopt it.
Pardon my French: they can go fuck themselves.
There is no way that I am ever clicking one of those links. If shit is confidential, e-mail is not the medium one should be choosing.
I have a well-kept archive of my e-mail since 2011. Only SPAM and newsletters get thrown out. Rest stays.
I am putting up a webpage with why I consider those mails to be madness, setup a filter with an automated reply and route the received self-distructing mails to /dev/null.