Get the email address associated with the certificate. If the
certificate contains more than one email address with different
validities, the email address with the highest validity is
returned. If more than one email address appears in the
certificate with the same (highest) validity, the first such email
address will be returned.
Get the email address associated with the certificate. If the certificate contains more than one email address with different validities, the email address with the highest validity is returned. If more than one email address appears in the certificate with the same (highest) validity, the first such email address will be returned.