> So I'm asking for a pointer to the "how mailing lists break > signatures" report, if it exists so I can learn a bit more.
This was argued at some length about a year ago, but I can't dig up offhand exactly where. Here's some of the more popular mutations: - Add fixed list name tag and varying message serial number to Subject: - Add, delete, or replace Reply-To: header - Reformat From: line into a standard form, e.g., <[EMAIL PROTECTED]> foo -> [EMAIL PROTECTED] (foo) - Add a bunch of extra headers like List-ID: and Precedence: (shouldn't affect signature unless one replaces an existing header) - Add a footer to the end of the body - Add a "fronter" to the beginning of the body - Add, delete, or reorder MIME parts - Unpack and re-pack MIME parts with different delimiters - Add a footer to one or more MIME parts - Edit a footer into an HTML part (Yahoo groups does this) - Convert HTML to text or vice versa - Recode between 7bit and 8bit, or quoted printable to/from base64 I quickly came to the conclusion that other than the shrinking minority of lists that do nothing at all to headers or body, it's completely hopeless to try to make a signature that will survive list processing. And I still have a lot of trouble thinking of plausible scenarios where mail from a domain with SSP restrictions would legitimately be sent through a list. R's, John _______________________________________________ ietf-dkim mailing list http://dkim.org
