using hashcash with TMDA

There are two alternate sets of instructions for using hashcash with TMDA.

using hashcash tool

See TMDA hashcash HOWTO. This approach supports both incoming and outgoing hashcash support. Note it blocks on outgoing sends until the hashcash has been computed. You can avoid the blocking on outgoing send by using the hashcash-sendmail approach described below.

using hashcash-sendmail

See instructions under TMDA on Kyle Hasselbacher's hashcash-sendmail page.