Custom MIME message

Hi Experts,

We are on PO 7.4.

We have integration with external partner using ebXML over HTTP and trying to build a custom solution.

The ebXML specification needs a custom SOAP envelope and has specifications for the overall MIME message as well.

The MIME message package should be a multipart message with the SOAP envelope. the xml business document as attachment and the content id of attachment referencd in SOAP Body.

Is there a way to build the custom MIME message in PO and use standard HTTP or SOAP adapter to post to the partner.

Thanks.

Regards,

Sudharshan N A