Not sure if anyone has started a thread like this but here it goes. The rules are you can only send reply back using N95 barcodes as i have in the next post:
Use this site: http://datamatrix.kaywa.com/
to generate your message reply (selecting the text box)
Select XL, click generate, Save the barcode as a picture
Upload to your favourite picture hoster as 320x320, then reply back by inserting the image url.