Annalivia posted more information over on the AOL Postmaster blog about the upcoming conversion of the AOL FBL to ARF only. Specifically, she provides instructions for how to read the FBL emails in different email clients.
ARF can be read in most major email clients with a little human intervention. The content of the header will be the same as the original format, in that the same redactions will be present. In the event that the recipient information is in the body of the email such as in a footer that says, for example, “recipient@aol.com is subscribed to this mailing list”, we will not redact that, and it will be contained in its original format in the human-readable attachment. If the recipient information is in an X-header, it can be accessed by setting the mail reading software being used to show headers, or by viewing the source of the ARF report.