On 29 Jul 2015 20:55:55 +0200 Christian Jaeger wrote: > Hi > > I've implemented (or at least so I thought) Hashcash for my outgoing > mail (in a Perl wrapper around qmail-remote that I already had to do > DKIM), using the `hashcash` tool as provided by Debian, using the > `-X` command-line option. This tool returns multi-line headers if the > email address the hash-cash is minted for is long enough. This might > be the reason that Mail-SpamAssassin-3.4.1 ignores those, I guessed, > so I delved into the code. > > Here's an example header it generates (you could also check the > source of this email): > > X-Hashcash: > 1:23:150729:c...@a.christianjaeger.ch::BIsU5nVO5XGrvOIr:00000000000000 > 0000000000000000000000006t75
This eventually worked for me, when I set-up hashcash correctly. The plugin is on by default and use_hashcash defaults to 1, but you need to set hashcash_accept to an appropriate value to allow c...@a.christianjaeger.ch.