how to schedule a message based on the content

Hello!

I want to receive a async SOAP-message in XI and send it to the destination not before

sy-datum >= content of payload-field.

I.E:

<message>

<contractnumber>4711</contractnumber>

<datefrom>20100901</datefrom>

</message>

The Destination Interface (Inbound Interface) sould be called the 09.Sep. 2010 or later.

Quality of Service = Exactly once. Not EOIO.

Any idea?