12
I know there is a way to invalidate an attachment sent along with the email, but not sure about the email itself.
This, also isn't true. Attachments are just encoded in a way that allows the email system to transfer them, but they are carried within the same message. This would be different if you don't actually attach the file, but instead upload the file ...
7
How to pull back an email that has already been sent?
After it was sent, probably in no way, but
the administrator of the receiving server (who manages the mailbox of the e-mail address of the wrong recipient), could still physically delete the mail from the server before it is accessed. It is a question of time and opportunity.
Time. This is obviously ...
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