Re: [arch-d] IAB Statement on Encryption and Mandatory Client-side Scanning of Content

[John Levine <[e-mail]>]

It appears that Phillip Hallam-Baker <[e-mail]> said:
w>Early spam filtering did rely heavily on content filtering but that
>approach has become less and less important as there are trivial
>countermeasures that present a massive asymmetric work factor to the
>advantage of the abuser.
>
>Modern filtering is relying much more on metadata.

Not so much as you'd think.  Yes, metadata is helpful but all of
the freemail providers are plagued by people who sign up for
throwaway accounts to send spam.  You have to do content analysis
to tell which of the mail Gmail and Microsoft are sending you is spam.

Not that this has much to do with the topic at hand, since as you
note, spam filtering is actively desired by any sane mail user.

R's,
John