That only establishes that an e-mail sent from john@example.com was authorized f... | Hacker News

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		cbg0 on March 13, 2019 \| parent \| context \| favorite \| on: Why is no one signing their emails? That only establishes that an e-mail sent from john@example.com was authorized for sending by example.com.

jhasse on March 13, 2019 [–]

And if example.com is a decent email provider, this also proves that it was sent by john, because otherwise the SMTP server wouldn't sign the outgoing email with a wrong login.

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