I got everything squared away for both the minting and verification scripts in Python. I blogged about them here: http://pthree.org/2011/03/24/hashcash-and-mutt/ http://pthree.org/2011/03/29/verifying-hashcash-tokens-with-mutt/ A friend of mine suggested that I create a project out of it, seeing as though both scripts are a bit feature stripped. So, I launched it on GitHub: https://github.com/atoponce/Penny-Red Hashcash might be dead for the rest of the world, but from what I can tell, antispam MTA software has support for Hashcash, such as SpamAssassin, so at least I run the higher probability that my sent mail won't end up in the recipient's SPAM folder. Maybe during the process, I can raise a little advocation too, and get more people using it: http://identi.ca/group/hashcash http://twitter.com/search#search?q=%23hashcash The great thing with both Python scripts is they can be easily implemented into other MUA software. The mint_hashcash.py script only needs to write to your email headers, and the verify_hashcash.py script only needs to read the mail from STDIN and write its results to STDOUT. Anyway, thought I'd send a head's up about the project, seeing as though I've been bugging you this far. :) -- . o . o . o . . o o . . . o . . . o . o o o . o . o o . . o o o o . o . . o o o o . o o o