A while back, I presented my Archiver Component. It archives messages as they enter a receive pipeline or right before they leave a send pipeline. It turns out that "DT" found a problem with this component (thank you for reporting this). I have updated the original entry and fixed the code.
The error in the code I originally provided was to use BodyPart.GetOriginalDataStream() even if I had the right comment above it!:
// Get a *copy* of the original input stream originalStrm = bodyPart.GetOriginalDataStream();
I should have used BodyPart.Data which in the case of custom pipeline components makes a copy of the inbound message:
// Get a *copy* of the original input stream originalStrm = bodyPart.Data;
At this point, rewinding the stream into the finally block is not needed anymore. The updated source code can be found here.