The submitted title ("Emails sent to the wrong people are data breaches now?") broke the HN guidelines by editorializing. Please don't do that. The rule here is to use the original title, unless it is misleading or linkbait. In the latter case, please rewrite it in an accurate, neutral way, preferably using representative language from the article itself.

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They always have been. In what world would sending confidential information to someone who isn't supposed to have access to it not be considered a breach? Intent doesn't matter in these situations.

Why wouldn’t it be?

> “It was very quickly noticed and email recall procedures were implemented to reduce the number of accounts that received it,” Aranda said.

What are they talking about when they mention "email recall procedure[s]"? Once you've sent an email, you've sent it.

always has been if the contents of the mail are sensitive

I'm surprised no one has asked the obvious: why the heck were they emailing this kind of attachment period...

>“The Marine Corps takes the protection of individual Marines’ private information and personal data very seriously, and we have steps in place to prevent the accidental or intentional release of such information,” Aranda said.

Apparently not.