[derefr]

I think this is only for internal communications. They were talking about this feature being “enabled by your GSuite domain administrator.” Presumably it only works for email sent between members of the affected domain (though I’m not sure why they’d fail to mention that.)

[eitally]

No. It does, definitely, work with external recipients.

Source: am googler, have used.

[myrandomcomment]

How? If you send an email with this on to [e-mail] and I download the message to my IMAP client how does google magically reach out and delete it from my hard drive? Is the email HTML only that only displays the text when the user is online and that text is fetched from the Google server? Let us say it is and I view the email, how does Google stop me from cutting and pasting that email using my thunderbird, et.al. IMAP client?

[Spoom]

You view the message on a Google server through a browser. The message body is never actually sent to the recipient's address.

"When someone sends a confidential mode message, Gmail removes the message body and any attachments from the recipient's copy of the message. These are replaced with a link to the content. Gmail clients make the linked content appear as if it's part of the message. Third-party mail clients display a link in place of the content."

From https://support.google.com/a/answer/7684332

[myrandomcomment]

Thank you for explaining. Also I guess I will be able to write an auto reply message that say “Sorry, I refused to received messages of this nature.”

[voxic11]

What happens if domains have conflicting policies set?

[atonse]

Does that mean I then can't use a native mail client?