Email Content Customization

We are on BusinessObjects BI Platform 4.1 SP5.

Basic email content configuration within CMC only support text based emails and does not support HTML. We would like to send out HTML rich emails to our users when a report is completed as a result of a schedule execution. In addition, we would also like to include additional information in the emails that isn't available through the placeholders but only through the SDK API. We are creating schedules through the API and users are not going through CMC or Launchpad.

I am interested in hear solution ideas. My research is just starting but for now the only ideas I have are following:

1. Create a Crystal Reports processing extension - this option requires C++ programming and only applies to Crystal Reports. Further, processing extensions while supported in 4.1 do not seem to be in use much and support for future is unclear.
2. Use File System (or FTP) destination and post process - this requires us to save users email information (to, cc, bcc, subject, etc.) somewhere and not as part of the destination (I think).
3. Implement customization on the email server - we can look into this but not sure what options are available yet.

Thanks in advance for your time.

Adnan