[hashcash] hashcash integration on MTA level for postfix
- From: decoder <decoder@xxxxxxxxxxxx>
- To: hashcash@xxxxxxxxxxxxx
- Date: Wed, 16 Aug 2006 20:59:53 +0200
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Hello there,
I'm new to hashcash and noticed that there isn't much MTA support for
it. From my point of view, starting this at MUA level is pointless so
I wrote a content_filter for postfix which stamps all outgoing mails.
I've put a first (alpha) version online at
http://users.own-hero.net/~decoder/hashcash/
The script is integrated into the master cf like every other
content_filter, for example with these 2 lines:
smtp inet n - n - - smtpd
-o content_filter=hashcash:dummy
hashcash unix - n n - - pipe
flags=Rq user=hashcashuser argv=/usr/local/bin/hashcash.pl -f
${sender} -- ${recipient}
It checks if the mail it currently processes is an outgoing mail (from
field contains specified domain(s) and last Received: line contains an
SMTP from a given list), then it stamps it and requeues the mail for
sending.
The only thing that doesn't work yet is Bcc: (All mails are delivered
but every mail contains all hashcash headers). I am currently working
on this, together with a major restructuring as this version is really
ugly (proof of concept only).
Hope someone has use for this :)
Chris
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