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Re:Email Explained from First Principles by that_guy_iain on Saturday May 08, 2021 @05:51PM (#27091077)
Gmail doesn’t send instantly. This is why they could add the undo feature for sending emails.
Re:Email Explained from First Principles by PeterisP on Saturday May 08, 2021 @07:06PM (#27091622)
That explains a ten second delay, not a couple of hours as parent poster claims.