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What must an X.509 certificate include to allow it to be recognized as an email certificate for use with S/MIME?

April 26, 2017Certificate email mime recognized s X.509

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What must an X.509 certificate include to allow it to be recognized as an email certificate for use with S/MIME?

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An email address must be included in the attribute of the subject DN or the mail attribute of the subject DN. If the subject DN does not include an email address, the certificate extension subjectAltName must include an email address. The subjectAltName extension is part of the X.509 v3 and PKIX specifications.