[hashcash] Re: PR Problem?

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Todd A. Jacobs wrote:
> On Thu, Nov 09, 2006 at 04:48:44PM +0000, DeLesley Hutchins wrote:
>
>
>> I was surprised to find that Thunderbird still has no HashCash
>> support.  It's a popular mail-reader, open source, with a plugin
>
> Open-source programming requires that someone with some programming
> skill has an itch to scratch. Apparently, nobody capable of writing
> Thunderbird plugins has felt that itch yet or it would already have been
> done.
>
> Integration is an issue. Hashcash is *not* trivial to implement at the
> MUA level, isn't a drop-in piece of the MDA toolchain, and even MTA
> support (where it exists) may not play well with other tools.
>
> TMDA (http://tmda.net) has had hashcash support for a while in the
> development branch, but only recently in the stable branch. And even
> there, while you can get hashcash to work, it's not self-evident how to
> really apply the process to inbound mail (e.g. do you use hashcash to
> bypass C/R, or to modify your scoring, or something altogether
> different?) and so it isn't turned on by everyone.
>
> If you want wider uptake, you have to address the installed based of
> software. And more importantly, you have to convince people that it adds
> value to install and configure it even if almost no one else does the
> same. OpenPGP cleartext-signing is a great example of this philosophy:
> it provides some observable utility (non-repudiation) even if the vast
> majority of one's email correspondents don't use PGP/GPG.
>
> FWIW, now that TMDA supports hashcash in the stable branch, *I* use it
> to mint stamps on all outgoing email from my MUA. But I don't check
> incoming email, because:
>
>     1. I almost never get X-Hashcash headers from anyone I know, and
>
>     2. I don't really see the informational value of checking for it
>        with my existing toolchain, since I don't use scoring per-se.
>
> At some point, if I'm feeling industrious, I might try to whomp up a
> procmail filter that appends an X-Hashcash-Validated header to messages
> that have valid stamps, so that bogofilter (or other tools) might score
> them a bit higher. That would be useful to me. How do *you* use
> X-Hashcash headers?

Currently we stamp all outgoing mails on our postfix server (just some
Bcc: stuff does not work), and we check hashcash stamps with
spamassassin. Works fine though we almost never receive any stamped
mails.... Maybe it will change when I write a Thunderbird plugin

Regards,

Chris

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