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    SubjectRe: VGER does gradual SPF activation (FAQ matter)
    Date
    Thinking more on this and looking for possible solutions:  One  
    (voluntary) technical solution to a mildly technical problem of lack
    of authenticity would be to write a mail server (or just glue postfix
    and apache with some perl CGIs) which stored the emails locally and
    added a header like this:
    > X-Hosted-Email: http://my.mail.server/hosted-email?id=$BASE64_HASH

    Then replace the body with this:
    > You have received a hosted email from "John Doe"
    > <jdoe@mail.server>. Click the link below to view the email, or
    > install a free hosted-email client from http://
    > oss.hosted.email.project/
    >
    > http://my.mail.server/hosted-email?id=$BASE64_HASH

    The templated message might start to get filtered by a few spam-
    filters, but it makes blacklisting of abusers much easier so such
    messages could easily be given a big +bonus in spamassassin or
    similar. If each compliant server along the way checked that the
    host server was up and provided a compliant SMTP-over-HTTP email it
    would be a trivial load for individual hosts but a quite considerable
    load for spammers. In addition it's possible to implement other
    checks like wait-for-http-response-before-accepting-email, content
    filters, digital signatures, and other processing steps. Such a
    system would be very reliable and easy to implement by relying on
    existing proven technologies (SMTP and HTTP) in completely standards-
    compliant ways. Just some food for thought.

    Cheers,
    Kyle Moffett
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