…However, if the emails contain cryptographic DKIM signatures generated by trustworthy third parties (such as a reputable email provider), then the emails are provably real, no matter how questionable the character who gave them to you. Cryptographic signatures don’t decay with social distance or sordidness. Data thieves are able to piggy-back off of Gmail’s (or any other DKIM signer’s) credibility, making stolen, signed emails a verifiable and therefore more valuable commodity.…