I'm attempting to follow the instructions located here
by sending an email to the JCA Code Signing Certification Authority at email@example.com with the required information and CSR.
However, the email is immediately bounced back from Oracle's servers with a message of
<firstname.lastname@example.org>: host aserp1060.oracle.com[18.104.22.168]
said: 553 5.3.0 <email@example.com>... 550:5.7.1 Internal
Lists are not available from the Internet. (in reply to RCPT TO command)