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Yup. Looks to be their email address. Email is from PR firm Sard Verbinnen & Co.

Safelinks have the email address of the recipient of a link.

To be fair, Alex's public profile includes a link to his email: https://cisac.fsi.stanford.edu/people/alex-stamos-0

Probably someone internally emailed Alex's Stanford profile to their blog content writer - the sender had email tracking enabled and the writer blindly copied the link.