From: "Perry E. Metzger" <perry@imsi.com>
Date: Tue, 7 Feb 95 08:49:48 PST
To: Hal <hfinney@shell.portal.com>
Subject: Re: MIME based remailing commands
In-Reply-To: <199502071636.IAA15674@jobe.shell.portal.com>
Message-ID: <9502071649.AA08393@snark.imsi.com>
MIME-Version: 1.0
Content-Type: text/plain



I was actually contemplating going a bit further, and making the core
message not a "text/plain" but a Message/Rfc822, but without a "From",
or perhaps with a "From: somethingfictitious". I also wouldn't declare
the contents to be a multipart -- rather I'd have them be a security
multiparts container that in turn contained a multipart containing a
remail commands section and another security multipart...

Hal says:
> From: "Perry E. Metzger" <perry@imsi.com>
> > 
> >     I'd say that it would work far better if things were changed to MIME
> >     formats. You would send a message by recursively encapsulating your
> >     message to be remailed inside a MIME message. Simple and clean...
> 
> Here is an example of how such a mesage might look.  I created it using
> the safe-tcl scripting language.  Interestingly, safe-tcl can to a
> considerable extent be considered a tcl extension to let you work easily
> with mime messages.  It makes it easy to create and parse them.
> 
> The whole message could be encrypted and marked with the "Encrypted: PGP"
> header as we do now, or when the new PGP/MIME standard is finalized then
> that could be followed.
> 
> I made up two new content types for this, one to hold the composite
> multipart message, and one to hold the remailer commands themselves.
> Although these types are not implemented, I think it would be very easy
> to make a remailer that would use this structure, built out of safe-tcl.
> (The batching and latency would not be trivial, but the basic remailing
> would be easy.)
> 
> Hal
> 
> > To: hfinney@shell.portal.com
> > Subject: No subject
> > Mime-Version: 1.0
> > Content-Type: multipart/remail; boundary="----- =_792174086"
> > Content-ID: <1471.792173861.3@cryo>
> >  
> > ------- =_792174086
> > Content-Type: application/remail-commands
> > Content-ID: <1471.792173861.1@cryo>
> > 
> > Latency: 2 hours
> > Minimum-Batch-Size: 5 messages
> > Anon-Send-To: cypherpunks@toad.com
> > Subject: Example of remailed message
> >  
> > ------- =_792174086
> > Content-Type: text/plain
> > Content-ID: <1471.792173861.2@cryo>
> >  
> > This is a message which is being sent to the mailing list.
> > It is being remailed via a MIME-based structure where two new content types
> > are defined: multipart/remail and application/remail-commands.  The
> > multipart/remail type is supposed to be composed of two parts, the
> > application/remail-commands part which has remailer commands, and the
> > other part which is the "payload" to be remailed.
> >  
> > ------- =_792174086--