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by blokey 1016 days ago
They are not different in gmail terms.

If you have John.Doe registered, no one can register johndoe or any with or without dots version.

Gmail (rightly or wrongly, whatever) ignore the dots when creating your account and deliver any with or without dots combination to you.

You’re not receiving anyone else’s mail and no one could have registered another account with/without dots to conflict with it.