[dantillberg]

If this story is true, this would appear to be a simple vector for hijacking email intended for other gmail users. Hard to understate the severity if true.

Have you tested whether you can receive email directed to [e-mail]? Perhaps theirs is really [e-mail] and all their contacts "correct" it.

[gibolt]

This feels like a bug that he snuck through early or during a temporary window, before Google started defaulting to . as an ignored alias. Maybe not ¯\_(ツ)_/¯